Current weather · Sep 28, 3:16 AM CDT

44.4100, -88.0010

54°

Mostly CloudyFeels like 54° · Humidity 86%NWS forecast for this hour; no recent station reportForecast by NWS Green Bay, WI · grid 80,27
High
73°
Low
50°
Rain today
2%
Sunrise
6:46 AM
Sunset
6:38 PM

Hour by hour

NWS forecast grid

Scroll sideways for more hours. Pick an hour for every number.

Every hour as a table48 hours
TimeWeatherTemperatureFeels likeDew pointHumidityChanceAmountSnowDirWindGustSky coverThunderPressureVisibilityCeiling
Mon 3 AM54°54°50°86%2%W1 mph5 mph54%—10 mi
Mon 4 AM54°54°50°86%1%NW1 mph5 mph45%—10 mi
Mon 5 AM53°53°50°89%1%NNW1 mph3 mph39%—10 mi
Mon 6 AM52°52°50°93%1%N1 mph3 mph33%—10 mi
Mon 7 AM51°51°51°100%1%N1 mph3 mph31%—9 mi
Mon 8 AM54°54°53°96%1%N1 mph5 mph26%—8 mi
Mon 9 AM57°57°55°93%1%NNE1 mph3 mph20%—9 mi
Mon 10 AM63°63°56°78%1%NNE2 mph5 mph17%—10 mi
Mon 11 AM66°66°55°68%1%NNE2 mph5 mph14%—10 mi
Mon 12 PM69°69°55°61%1%NNE2 mph3 mph11%—10 mi
Mon 1 PM71°71°55°57%1%NNE2 mph3 mph11%—10 mi
Mon 2 PM72°72°55°55%1%NNE2 mph3 mph11%—10 mi
Mon 3 PM73°73°56°55%1%NNE2 mph3 mph10%—10 mi
Mon 4 PM73°73°56°55%1%NE2 mph3 mph7%—10 mi
Mon 5 PM71°71°55°57%1%NE2 mph3 mph6%—10 mi
Mon 6 PM69°69°56°63%1%E3 mph5 mph6%—10 mi
Mon 7 PM66°66°56°70%1%ESE3 mph6 mph6%—10 mi
Mon 8 PM60°60°56°87%1%SE3 mph7 mph11%—10 mi
Mon 9 PM58°58°55°90%0%SE3 mph7 mph13%—9 mi
Mon 10 PM57°57°54°90%0%SSE3 mph7 mph17%—9 mi
Mon 11 PM56°56°53°90%1%SSE3 mph7 mph19%—9 mi
Tue 12 AM56°56°53°90%1%S3 mph6 mph21%—8 mi
Tue 1 AM55°55°52°90%1%S3 mph6 mph35%—8 mi
Tue 2 AM54°54°52°93%1%S2 mph6 mph42%—7 mi
Tue 3 AM53°53°51°93%1%S2 mph6 mph32%—7 mi
Tue 4 AM52°52°50°93%1%S2 mph6 mph35%—6 mi
Tue 5 AMPatchy fog52°52°50°93%0%S2 mph6 mph36%—5 mi
Tue 6 AMAreas of fog50°50°49°96%1%S2 mph6 mph44%—1.0 mi
Tue 7 AMPatchy fog51°51°49°93%0%S2 mph6 mph44%——
Tue 8 AM54°54°52°93%0%S3 mph7 mph37%——
Tue 9 AM58°58°54°86%0%S3 mph8 mph41%——
Tue 10 AM64°64°55°73%0%S5 mph10 mph41%——
Tue 11 AM67°67°56°68%0%S7 mph12 mph44%——
Tue 12 PM69°69°56°63%0%S8 mph14 mph52%——
Tue 1 PM71°71°56°59%0%S9 mph15 mph55%——
Tue 2 PM72°72°56°57%0%S9 mph15 mph52%——
Tue 3 PM72°72°56°57%0%S9 mph15 mph53%——
Tue 4 PM73°73°56°55%0%S9 mph15 mph58%——
Tue 5 PM71°71°56°59%0%S8 mph14 mph54%——
Tue 6 PM70°70°57°63%0%S7 mph13 mph72%——
Tue 7 PM67°67°57°70%10%SSE7 mph13 mph83%1%——
Tue 8 PM64°64°57°78%10%SSE8 mph14 mph92%1%——
Tue 9 PM63°63°57°81%10%S9 mph16 mph88%1%——
Tue 10 PM63°63°56°78%10%S9 mph17 mph84%7%——
Tue 11 PM63°63°56°78%10%S9 mph18 mph87%7%——
Wed 12 AM64°64°56°75%10%S9 mph17 mph89%7%——
Wed 1 AMChance of moderate rain showers64°64°56°75%50%0.04 inS9 mph17 mph92%14%——
Wed 2 AMChance of moderate rain showers64°64°56°75%50%0.04 inS9 mph17 mph90%14%——

The next 16 days

NWS grid published Sep 28, 1:46 AM CDT to day 8, the National Blend of Models to day 10, the mean of GFS, ECMWF, ECMWF AI to day 16
  1. TodaySep 2873°50°Sunny2%wind 3 mph
  2. TueSep 2973°60°Areas Of Fog then Mostly Sunny10%wind 9 mph · gusts 18 mph
  3. WedSep 3068°61°Rain Showers78%0.83 inwind 12 mph · gusts 21 mph
  4. ThuOct 167°46°Showers And Thunderstorms75%0.67 inwind 9 mph · gusts 16 mph
  5. FriOct 262°44°Mostly Sunny7%wind 6 mph
  6. SatOct 363°47°Patchy Fog then Mostly Sunny7%wind 6 mph · gusts 12 mph
  7. SunOct 462°45°Partly Sunny13%wind 8 mph · gusts 15 mph
  8. MonOct 560°44°10%wind 7 mph
  9. TueOct 662°48°National Blend11%wind 9 mph · gusts 15 mph
  10. WedOct 763°47°National Blend10%wind 9 mph · gusts 15 mph
  11. ThuOct 8~61°47°Model mean0.39 in
  12. FriOct 9~52°39°Model mean0.11 in
  13. SatOct 10~58°45°Model mean0.02 in
  14. SunOct 11~53°41°Model mean
  15. MonOct 12~49°32°Model mean
  16. TueOct 13~45°27°Model mean

Right now

NWS grid for this hour · UV from the EPA · air quality from AirNow
  • Feels like54°
  • WindCalmgusts 5 mph
  • Radar over this pointno reading
  • Humidity86%
  • Dew point50°
  • Pressure—
  • UV index—
  • Air quality—
  • Visibility10 mi
  • Sunrise and sunsetSunrise · Sunset · not yet up
  • Moonrise7:15 PMMoonset 9:09 AM
  • Moon phaseWaning gibbous95% lit

The National Blend of Models

NOAA NBM v5.0 · run of Sep 27, 7:00 PM CDT

NOAA’s weighted blend of every model it runs, to eleven days, with the chances the grid above does not carry. Where the local office’s grid reaches, its figure sits beneath the blend’s; where it does not, the blend stands alone.

  1. TodaySep 2873°51°NWS grid 73° / 50°rain 2%wind 3 mph
  2. TueSep 2973°60°NWS grid 73° / 60°rain 48%thunder 16%0.02 inwind 9 mph · gusts 16 mph
  3. WedSep 3070°62°NWS grid 68° / 61°rain 65%thunder 17%0.40 inwind 10 mph · gusts 18 mph
  4. ThuOct 168°48°NWS grid 67° / 46°rain 70%0.52 inwind 9 mph · gusts 17 mph
  5. FriOct 262°45°NWS grid 62° / 44°rain 8%0.01 inwind 7 mph
  6. SatOct 362°47°NWS grid 63° / 47°rain 10%0.01 inwind 6 mph
  7. SunOct 462°46°NWS grid 62° / 45°rain 13%wind 9 mph · gusts 16 mph
  8. MonOct 559°45°NWS grid 60° / 44°rain 7%wind 7 mph
  9. TueOct 662°48°Beyond the NWS gridrain 11%wind 9 mph · gusts 15 mph
  10. WedOct 763°47°Beyond the NWS gridrain 10%wind 9 mph · gusts 15 mph
  11. ThuOct 862°—Beyond the NWS gridrain 8%wind 9 mph · gusts 15 mph
41°59°77°TueWedThuFriSatSunMon

BlendNWS gridChance of rain, hourly

The models, side by side

HRRR Sep 27, 7:00 PM CDT · GFS Sep 27, 7:00 PM CDT · GEFS Sep 27, 7:00 PM CDT · ECMWF Sep 27, 7:00 AM CDT · ECMWF AI Sep 27, 7:00 PM CDT

Each line is one model’s own forecast at its own grid cell: three kilometers for HRRR, a quarter of a degree for the global models, which can sit a few hundred meters above or below the town. Where they agree the forecast is settled; where they part is where it is not.

41°59°77°TueWedThuFriSatSunMon

DayNWS gridHRRRGFSGEFSECMWFECMWF AI
Today Sep 2873° 50°72° 50°69° 56°69° 54°74° 53°~73° 53°
Tue Sep 2973° 60°73° 49°71° 53°0.01 in71° 53°0.04 in71° 53°0.10 in~73° 52°0.28 in
Wed Sep 3068° 61°0.83 in—64° 60°1.15 in64° 61°0.62 in67° 61°1.16 in~71° 62°0.29 in
Thu Oct 167° 46°0.67 in—64° 54°0.78 in65° 56°0.33 in67° 56°~70° 65°0.37 in
Fri Oct 262° 44°—58° 47°60° 49°0.16 in63° 48°~65° 49°
Sat Oct 363° 47°—63° 47°0.08 in60° 50°0.19 in~64° 46°~64° 45°
Sun Oct 462° 45°—61° 48°0.04 in60° 51°0.02 in~62° 51°~66° 53°0.07 in
Mon Oct 560° 44°—58° 40°55° 43°~62° 55°~54° 40°
Tue Oct 6——54° 41°58° 42°0.03 in~64° 50°~61° 36°
Wed Oct 7——55° 48°0.26 in61° 48°0.04 in~68° 55°0.07 in~66° 51°0.18 in
Thu Oct 8——~58° 49°0.11 in—~59° 44°1.02 in~65° 48°0.04 in
Fri Oct 9——~49° 36°—~40° 37°0.33 in~68° 45°
Sat Oct 10——~48° 42°0.05 in—~49° 37°~76° 57°
Sun Oct 11——~47° 36°—~52° 41°~59° 46°
Mon Oct 12——~43° 28°—~47° 45°~54° 36°
Tue Oct 13——~45° 27°———

A ~ marks a high or low read from six-hourly steps, which miss the true extreme by a degree or two.

ECMWF ensemble meteogram

ECMWF ensemble meteogram for this place: box plots of cloud cover, precipitation, wind speed and temperature from the 51 ensemble members for ten days.
Rendered by ECMWF from its 51-member ensemble, in metric units: each box spans the middle half of the members, the whiskers the rest, the line the control run. A forecast, not an observation. © ECMWF, CC BY 4.0.

The next 90 days

NOAA GHCN normals and records at Ashwaubenon (GRB) · Climate Prediction Center outlooks

No forecast has skill day by day past about two weeks, and this page does not print one. Where the models stop, the calendar takes over: the 1991 to 2020 normal for each date, the record high and low ever set on it, and where the Climate Prediction Center leans warm, cool, wet or dry over the coming weeks, the month and the season. A site that shows a high for a date three months out is showing you this normal with a wobble.

The forecast reaches Tue Oct 13, from the NWS grid, then the National Blend, then the mean of the global models. Beyond it the lines are the calendar.

Climate Prediction Center (CPC) temperature leanwarmer 33% · Oct 202640% chance above normal · Oct to Dec-20°0°20°40°60°80°TodayOct 1Nov 1Dec 1

Forecast high and lowNormal high and lowRecord high and lowCPC leans warmer than normalCPC near normal or equal chances

Week ofNormalWarmest on recordColdest on recordTemperature leanPrecipitation lean
Sep 28—87° (2025)29° (2008)33% chance above normal · Oct 2026equal chances · Oct 2026
Oct 5—86° (2007)26° (2004)near normal most likely · days 8 to 1433% chance below normal · days 8 to 14
Oct 12—81° (2008)24° (2018)33% chance above normal · Oct 2026equal chances · Oct 2026
Oct 19—78° (2024)22° (2006)33% chance above normal · Oct 2026equal chances · Oct 2026
Oct 26—79° (2024)20° (2023)33% chance above normal · Oct 2026equal chances · Oct 2026
Nov 2—74° (2020)10° (2019)40% chance above normal · Oct to Decequal chances · Oct to Dec
Nov 9—74° (2020)6° (2019)40% chance above normal · Oct to Decequal chances · Oct to Dec
Nov 16—66° (2016)8° (2008)40% chance above normal · Oct to Decequal chances · Oct to Dec
Nov 23—61° (2017)7° (2005)40% chance above normal · Oct to Decequal chances · Oct to Dec
Nov 30—61° (2012)-5° (2007)40% chance above normal · Oct to Decequal chances · Oct to Dec
Dec 7—55° (2015)-7° (2025)40% chance above normal · Oct to Decequal chances · Oct to Dec
Dec 14—64° (2021)-13° (2010)40% chance above normal · Oct to Decequal chances · Oct to Dec
Dec 21—53° (2023)-16° (2004)40% chance above normal · Oct to Decequal chances · Oct to Dec

Health and activities

Rules of thumb over the next 24 hours of forecast, the warnings in force, the station’s report, air quality and pollen

None of these is a measurement. Each is a rating of the forecast ahead, and of what is happening at the point right now, against what the activity or the ailment is known to mind, and each names the figure that decided it. An ailment or a pest is rated as a risk, low to extreme; an activity, a chore or a journey as a condition, poor to ideal.

Each rating says which span it is for: the rest of today’s daylight, tonight, or the next 24 hours.

Health

  • Arthritisnext 24 hModeratehumid
  • Sinus pressurenext 24 hLowsteady conditions
  • Common coldtodayLowmild
  • FlutodayLowmild
  • Migrainenext 24 hLowsteady conditions
  • Asthmanext 24 hLowclean air
  • Heat stresstodayLowmild
  • SunburntodayLowweak sun
  • Frostbitenext 24 hLowmild
  • SleepingtonightIdealcool, quiet night

Outdoors

  • RunningtodayVery goodhot
  • HikingtodayIdealfine conditions
  • BikingtodayIdealfine conditions
  • GolftodayIdealfine conditions
  • FishingtodayIdealfine conditions
  • Boating and paddlingtodayIdealfine conditions
  • Beach and pooltodayIdealfine conditions
  • CampingtonightIdealfine conditions
  • StargazingtonightPoorpartly cloudy

Travel

  • Air travelnext 24 hIdealclear skies
  • Drivingnext 24 hIdealclear roads

Home and garden

  • Lawn mowingtodayIdealfine conditions
  • GardeningtodayIdealfine conditions
  • Outdoor entertainingtodayIdealfine conditions
  • Drying laundry outsidetodayVery goodhumid
  • Painting and outdoor projectstodayIdealfine conditions
  • FrosttonightLowmild

Pests

  • MosquitoestodayHighwarm
  • TickstodayHighwarm
  • Indoor pestsnext 24 hLowmild
  • Outdoor peststodayModeratewarm

Stargazing

Worked out from the NWS hourly forecast and the sun and moon

Tonight has no dark, clear hour without a bright moon in this forecast. Rated fair.

Night ofRatingDarkClear hoursClear and moonlessMoon litTransparency (est.)DewStrongest wind
MondayFair8:15 PM to 5:10 AM4 of 9None93%Poor8 h3 mph
TuesdayPoor8:13 PM to 5:12 AM0 of 9None87%9 mph
WednesdayPoor8:11 PM to 5:13 AM0 of 9None79%6 h9 mph
ThursdayPoor8:09 PM to 5:14 AM0 of 9None70%6 mph
FridayFair8:07 PM to 5:16 AM5 of 92 h from 8:00 PM60%Fair1 h2 mph
SaturdayPoor8:05 PM to 5:17 AM0 of 9None50%1 h5 mph
SundayPoor8:03 PM to 5:18 AM0 of 9None39%1 h5 mph

Dark is the sun 18 degrees below the horizon; where it never gets that low, 12 degrees, marked nautical. Clear is sky cover of 20% or less. A bright moon is one above the horizon with a quarter or more of its disc lit. Transparency in the table is estimated from surface humidity (70% and 85% mark fair and poor) and visibility, since the forecast carries no haze or high cloud moisture. Seeing and transparency by hour, where shown, are Environment and Climate Change Canada’s astronomy forecast (regional model; seeing from cloud, wind shear, turbulence near the ground and the surface temperature trend; transparency from the moisture through the whole air column), under the Open Government Licence - Canada. Dew is the air within 2 °C of its dew point. Excellent is four or more clear moonless hours with good transparency; good is three; fair is one, or two clear hours.

Golden hour and blue hour

Computed from the sun and moon positions
DayBlue hour, morningGolden hour, morningGolden hour, eveningBlue hour, evening
Mon6:17 AM to 6:29 AM6:29 AM to 7:25 AM6:00 PM to 6:56 PM6:56 PM to 7:07 PM
Tue6:19 AM to 6:30 AM6:30 AM to 7:26 AM5:58 PM to 6:54 PM6:54 PM to 7:05 PM
Wed6:20 AM to 6:31 AM6:31 AM to 7:27 AM5:56 PM to 6:52 PM6:52 PM to 7:03 PM
Thu6:21 AM to 6:32 AM6:32 AM to 7:29 AM5:54 PM to 6:50 PM6:50 PM to 7:01 PM
Fri6:22 AM to 6:33 AM6:33 AM to 7:30 AM5:52 PM to 6:48 PM6:48 PM to 7:00 PM
Sat6:23 AM to 6:35 AM6:35 AM to 7:31 AM5:50 PM to 6:47 PM6:47 PM to 6:58 PM
Sun6:25 AM to 6:36 AM6:36 AM to 7:32 AM5:48 PM to 6:45 PM6:45 PM to 6:56 PM
NESWSRSSMRMS
  • SR Sunrise 6:46 AM, 92° E
  • SS Sunset 6:38 PM, 268° W
  • MR Moonrise 7:15 PM, 65° ENE
  • MS Moonset 9:09 AM, 292° WNW
  • Waning gibbous, 95% lit

Golden hour is the sun between 6 degrees above the horizon and 4 degrees below it; blue hour is the sun between 4 and 6 degrees below. These are the definitions timeanddate.com and PhotoPills use. Directions are degrees clockwise from true north, where the sun’s upper edge and the moon’s center cross a flat horizon; hills and buildings change both. None means the sun does not reach that height on the day; all day means it stays inside the band.

Drone flying

NWS hourly forecast, SWPC Kp, FAA TFRs and 14 CFR Part 107

This hour: fly with caution (night: lighting and night training required (107.29)). Next good stretch: Mon 7 AM to 6 PM, 11 hours.

Today: civil twilight for Part 107 6:16 AM to sunrise 6:46 AM, and sunset 6:38 PM to 7:08 PM. Anti-collision lighting is required in those minutes and at night.

Mon6 AM12 PM6 PM
Tue12 AM6 AM12 PM6 PM
Wed12 AM6 AM12 PM6 PM

Good Caution No-fly

HourVerdictWind (mph)400 ft est. (mph)Gust (mph)RainVisibilityCloud allowsTempKpWhy
Mon 3 AMCaution1362%10 mi54°night: lighting and night training required (107.29)
Mon 4 AMCaution1581%10 mi54°night: lighting and night training required (107.29)
Mon 5 AMCaution1571%10 mi53°night: lighting and night training required (107.29)
Mon 6 AMCaution1571%10 mi52°night: lighting and night training required (107.29)
Mon 7 AMGood1141%9 mi51°nothing against it
Mon 8 AMGood1151%8 mi54°nothing against it
Mon 9 AMGood1141%9 mi57°nothing against it
Mon 10 AMGood2351%10 mi63°nothing against it
Mon 11 AMGood2351%10 mi66°nothing against it
Mon 12 PMGood2341%10 mi69°nothing against it
Mon 1 PMGood2341%10 mi71°nothing against it
Mon 2 PMGood2341%10 mi72°nothing against it
Mon 3 PMGood2341%10 mi73°nothing against it
Mon 4 PMGood2341%10 mi73°nothing against it
Mon 5 PMGood2341%10 mi71°nothing against it
Mon 6 PMCaution3451%10 mi69°civil twilight: lighting required (107.29)
Mon 7 PMCaution314161%10 mi66°night: lighting and night training required (107.29)
Mon 8 PMCaution314171%10 mi60°night: lighting and night training required (107.29)
Mon 9 PMCaution314170%9 mi58°night: lighting and night training required (107.29)
Mon 10 PMCaution314170%9 mi57°night: lighting and night training required (107.29)
Mon 11 PMCaution314171%9 mi56°night: lighting and night training required (107.29)
Tue 12 AMCaution314161%8 mi56°night: lighting and night training required (107.29)
Tue 1 AMCaution314161%8 mi55°night: lighting and night training required (107.29)
Tue 2 AMCaution29131%7 mi54°night: lighting and night training required (107.29)

Flight restrictions nearby

Reading the FAA’s temporary flight restrictions.

Flight restrictions on the map. TFRs are not the whole picture: controlled airspace around airports needs LAANC authorization. Check the FAA’s B4UFLY.

Wind at 400 ft is estimated from the 10 m forecast by the power law, with exponents for each Pasquill stability class (Irwin 1979, rural, as in EPA dispersion models; the class from wind, sun height and cloud, after Turner 1970); gusts keep the ground gust’s margin. Caution from three quarters of your limit; the default 24 mph is the wind resistance printed for common sub-250 g drones. 14 CFR 107.51: “The minimum flight visibility, as observed from the location of the control station must be no less than 3 statute miles” and at least “500 feet below the cloud”. 14 CFR 107.29: “No person may operate a small unmanned aircraft system during periods of civil twilight unless the small unmanned aircraft has lighted anti-collision lighting visible for at least 3 statute miles”; civil twilight is the 30 minutes before sunrise and after sunset, in Alaska the Air Almanac’s. Kp: SWPC’s scales say satellite navigation problems may occur at G3 (Kp 7) and navigation is “degraded for hours” at G4 (Kp 8); Kp 5 is the typical app warning. Typical limits, not rules: rain chance 30% caution and 60% no-fly, thunder 10% and 20%, below 0 °C caution and −10 °C no-fly, over 40 °C caution. Your drone’s manual and the airspace come first.

Spraying and field work

Worked out from the NWS hourly forecast

Hours fit for spraying, and the days dry enough for fieldwork and hay, read from this forecast’s wind, gusts, humidity, temperature and rain.

Spraying windows

  • Mon 6 PM to 8 PM 2 hours, every hour within the rules
  • Tue 10 AM to 9 PM 11 hours, every hour within the rules
  • Thu 4 PM to Fri 3 AM 11 hours, every hour within the rules
  • Fri 8 AM to 7 PM 11 hours, every hour within the rules
  • Sat 10 AM to 10 PM 12 hours, every hour within the rules
  • Sun 12 AM to 2 AM 2 hours, every hour within the rules
  • Sun 10 AM to 10 PM 12 hours, every hour within the rules
  • Mon 10 AM to 4 PM 6 hours, every hour within the rules
Mon6 AM12 PM6 PM
Tue12 AM6 AM12 PM6 PM
Wed12 AM6 AM12 PM6 PM
Thu12 AM6 AM12 PM6 PM

Good Marginal No

Field days

DayDaytimeChance of rainRainLowest humidityStrongest windDry days in a rowHay drying
MondayDry1%0.00 in55%3 mph2 d
TuesdayDry10%0.00 in55%9 mph1 d
WednesdayWet78%0.83 in81%12 mph
ThursdayWet49%0.67 in65%9 mph
FridayDry5%0.00 in52%6 mph4 d
SaturdayDry7%0.00 in56%6 mph3 d
SundayDry13%0.00 in60%8 mph2 d
MondayDry4%0.00 in55%7 mph1 d

Spraying: sustained wind 3 to 10 mph, the range US extension services and most labels give; gusts no more than 15 mph (this page’s limit); delta T (air minus wet-bulb temperature) 2 to 8 °C preferred and 8 to 10 °C marginal, from GRDC guidance, with the wet bulb by Stull’s formula; no hour at a 30% chance of rain or 0.25 mm forecast during the rain-free time. Follow the product label, which overrides all of this. Field days: dry is no daytime hour at a 30% chance and under 1 mm all day, wet is 6 mm (0.25 in) or more; soil moisture is not in the forecast, so ground still wet from earlier rain is not accounted for. Hay drying marks a dry day with humidity down to 50% and a breeze of 5 mph or more.

Solunar times

Computed from the moon’s position

The best-rated day this week is Monday, rated good.

DayRatingMajor periodsMinor periodsMoonSunrise, sunset
Mon Good12:51 AM to 2:51 AM1:17 PM to 3:17 PM8:39 AM to 9:39 AM6:45 PM to 7:45 PM 95%6:46 AM, 6:38 PM
Tue Good1:43 AM to 3:43 AM2:11 PM to 4:11 PM9:58 AM to 10:58 AM7:16 PM to 8:16 PM 90%6:48 AM, 6:36 PM
Wed Poor2:40 AM to 4:40 AM3:09 PM to 5:09 PM11:17 AM to 12:17 PM7:56 PM to 8:56 PM 82%6:49 AM, 6:34 PM
Thu Fair3:40 AM to 5:40 AM4:11 PM to 6:11 PM12:32 PM to 1:32 PM8:47 PM to 9:47 PM 73%6:50 AM, 6:32 PM
Fri Fair4:42 AM to 6:42 AM5:14 PM to 7:14 PM1:38 PM to 2:38 PM9:52 PM to 10:52 PM 64%6:51 AM, 6:31 PM
Sat Fair5:45 AM to 7:45 AM6:15 PM to 8:15 PM2:30 PM to 3:30 PM11:06 PM to 12:06 AM 53%6:52 AM, 6:29 PM
Sun Fair6:45 AM to 8:45 AM7:13 PM to 9:13 PM3:10 PM to 4:10 PM 43%6:54 AM, 6:27 PM

Periods in bold fall within an hour of sunrise or sunset. The weather’s side is the fishing index

Major periods are two hours centered on the moon’s passage overhead and underfoot; minor periods are one hour centered on moonrise and moonset: the conventional durations of John Alden Knight’s solunar tables (1936). The rating is this site’s: one point to start, two more within a day and a half of a new or full moon (one more within three and a half days), and one more when a period falls within an hour of sunrise or sunset. The theory has mixed support in fisheries research; the times are exact astronomy.

In words

NWS forecast periods, as issued
  1. Overnight51° · 2% · WNW 1 mph

    Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. West northwest wind around 1 mph.

  2. Monday73° · 1% · NNE 2 mph

    Sunny. High near 73, with temperatures falling to around 71 in the afternoon. North northeast wind around 2 mph.

  3. Monday Night50° · 1% · SSE 3 mph

    Patchy fog after 5am. Mostly clear. Low around 50, with temperatures rising to around 52 overnight. South southeast wind around 3 mph.

  4. Tuesday73° · 1% · S 2–9 mph

    Areas of fog before 8am. Mostly sunny, with a high near 73. South wind 2 to 9 mph.

  5. Tuesday Night60° · 50% · S 9 mph

    A chance of rain showers after 1am. Mostly cloudy, with a low around 60. South wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

  6. Wednesday68° · 78% · SSW 12 mph

    Rain showers. Mostly cloudy, with a high near 68. Chance of precipitation is 80%.

  7. Wednesday Night61° · 78% · SSW 9 mph

    Rain showers before 7pm, then showers and thunderstorms. Cloudy, with a low around 61. Chance of precipitation is 80%.

  8. Thursday67° · 75% · W 9 mph

    Showers and thunderstorms. Mostly cloudy, with a high near 67. Chance of precipitation is 80%.

  9. Thursday Night46° · 26% · NW 6 mph

    A chance of rain showers before 7pm. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.

  10. Friday62° · 5% · NW 6 mph

    Mostly sunny, with a high near 62.

  11. Friday Night44° · 6% · WNW 3 mph

    Mostly clear, with a low around 44.

  12. Saturday63° · 7% · S 1–6 mph

    Patchy fog before 7am. Mostly sunny, with a high near 63.

  13. Saturday Night47° · 12% · S 5 mph

    Partly cloudy, with a low around 47.

  14. Sunday62° · 13% · SSW 5–8 mph

    Partly sunny, with a high near 62.

The forecaster’s discussion

NWS Green Bay, WI · issued Sep 28, 1:21 AM CDT

Written by the forecaster on duty for their own colleagues and for anyone who wants to know why the forecast says what it says. It is not edited for the public, so it uses the office’s shorthand; it is also the most honest thing any weather service publishes.

KEY Messages

Patchy dense ground fog is expected this morning across central and north-central Wisconsin, locally reducing visibilities below 1 mile before clearing by 10 AM.

Patchy dense ground fog is possible late tonight into Tuesday morning across eastern Wisconsin.

Rain shower and thunderstorm probabilities increase to 60 to 90 percent Tuesday night into Wednesday night as a slow-moving upper-level trough and surface cold front traverse Wisconsin.

Cooler conditions filter in behind the cold front Thursday through the weekend, with high temperatures falling into the low-60s and overnight lows dropping into the mid-30s across north-central Wisconsin.

Discussion

120 AM CDT Mon Sep 28 2026

Patchy Dense Fog this Morning and again Tonight: Cloud cover is ubiquitous across the region early this morning, which has limited the scope and severity of the fog across north-central Wisconsin. However, cloud cover is still expected to thin out through 5 AM. The decreased cloud cover, combined with radiational cooling and light winds still favors nocturnal ground fog development later this morning across mainly north-central Wisconsin. NBM statistics for visibilities below 1 mile have decreased to 20 to 40%, mainly across north-central Wisconsin with central Wisconsin down to around 10%. Any fog that forms will rapidly dissipate by 10 AM as morning solar heating drives boundary layer mixing.

The threat for fog shifts to the east tonight into Tuesday morning as the hi res models and HREF indicate some patchy fog is possible across east-central and far northeast Wisconsin. There is more spread in visibilities, with lower chances for visibilities less than 1 mile; however, this will still bear watching as the fog forecasting has been tricky the last few days.

Prolonged Dry And Mild Early Week Pattern: Deep-layer atmospheric subsidence associated with the persistent surface high pressure ridge will lock in dry and tranquil weather across the forecast area through Tuesday afternoon. Inland high temperatures will warm into the mid-70s today, while light onshore lake breezes keep Lake Michigan shoreline communities slightly cooler in the upper 60s. NBM ensemble guidance exhibits high confidence with tight 10th to 90th percentile temperature spreads of only 2 to 3 degrees F for daily highs today.

Midweek Frontal System And Widespread Rainfall: Deterministic and ensemble guidance consensus tracks a slow-moving northern stream trough and advancing surface cold front into the Upper Mississippi Valley Tuesday night into Wednesday night. Strong low-level moisture transport will elevate rain probabilities to 60 to 90 percent Tuesday night through Wednesday night. NBM probabilistic guidance indicates a 70 to 90 percent probability of 48-hour QPF exceeding 0.50 inches across the region, with a solid 60 to 80 percent of 1 inch or more, and 30 to 60 percent chance of 2 inches or more west of the Fox Valley. NBM 50th percentile liquid accumulation ranges between 1.50 and 2.6 inches along and west of the Fox Valley. SBCAPE values under 300 J/kg and poor shear-moisture overlap will keep thunderstorm activity isolated, mainly south of highway 10, and mitigate any severe weather potential.

Late Week Cooling Trend And Frost Potential: Post-frontal cold air advection will usher in a cooler and drier airmass Thursday through the weekend, dropping daytime highs into the low to mid-60s area-wide. As high pressure builds southward from Canada, light winds and clearing skies will promote efficient radiational cooling on Friday night. NBM temperature percentiles show overnight minimum temperatures dropping into the mid to upper 30s across Vilas, Oneida, and Forest counties Friday night. This setup yields a 15 to 30 percent probability of frost in sheltered low- lying spots across the Northwoods before high pressure begins shifting east over the weekend.

Aviation

1102 PM CDT Sun Sep 27 2026

for 06Z TAF Issuance

SCT to BKN low to mid clouds prevailed across much of the region late this evening with some patchy fog reported in north-central WI. These SCT to BKN clouds will stick around through the night as the patchy fog becomes more widespread in north-central and parts of central WI, with locally dense fog and IFR/LIFR vsbys between 08-15z Mon. Confidence remains highest for the dense fog at RHI where some clearing has occurred, and lower at AUW and CWA. Patchy fog may be possible in some spots in east-central WI, but confidence is not high enough to include in the east-central WI TAF sites due to the cloud cover. Any fog will burn off around 14-15z Mon, with SCT mid-level clouds sticking around for much of Monday. Winds will be light and variable throughout this TAF period.

GRB Watches / Warnings / Advisories

None.

Hazardous weather outlook Sep 28, 1:24 AM CDT

The office’s own seven-day heads-up for spotters and emergency managers.

FLUS43 KGRB 280624
HWOGRB

Hazardous Weather Outlook
National Weather Service Green Bay WI
124 AM CDT Mon Sep 28 2026

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-290630-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
124 AM CDT Mon Sep 28 2026

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Today and Tonight

Patchy dense fog is expected this morning over north-central and 
portions of central Wisconsin.

Patchy dense fog will be possible late tonight over east-central 
and northeast Wisconsin.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Patchy dense fog will be possible into early Tuesday morning over
east-central and northeast Wisconsin.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$

LMZ521-522-541>543-290630-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
124 AM CDT Mon Sep 28 2026

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Today and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Conditions hazardous to small craft will be possible on Wednesday.

$$

Kurimski

The outlooks beyond

SPC, WPC, CPC and the Drought Monitor, read at this point

The national centers each publish a judgment the local grid does not carry. Read here at this exact coordinate.

Severe weather

  1. Day 1 · Mon Sep 28No risk area
  2. Day 2 · Tue Sep 29No risk area
  3. Day 3 · Wed Sep 30No risk area
  4. Day 4 · Thu Oct 1No risk area
  5. Day 5 · Fri Oct 2No risk area
  6. Day 6 · Sat Oct 3No risk area
  7. Day 7 · Sun Oct 4No risk area
  8. Day 8 · Mon Oct 5No risk area

Rainfall

  1. Day 1 · Mon Sep 28Under 0.01 in
  2. Day 2 · Tue Sep 290.10 in
  3. Day 3 · Wed Sep 301.00 in
  4. Day 4-5 · Oct 1–Oct 20.25 in
  5. Day 6-7 · Oct 3–Oct 4Under 0.01 in

The rainfall forecast on the map, days 1 to 7

Six to fourteen days

  1. Days 6–10 · TemperatureNear normal most likelyOct 3–Oct 7
  2. Days 6–10 · PrecipitationNear normal most likelyOct 3–Oct 7
  3. Days 8–14 · TemperatureNear normal most likelyOct 5–Oct 11
  4. Days 8–14 · Precipitation33% chance below normalOct 5–Oct 11

Drought

  1. Drought Monitor, map of Sep 22D0 Abnormally dry

Drought in this county: the map, the record since 2000 and the outlook

Frost and climate

NOAA 1991-2020 normals, Green Bay

The last spring freeze (32°F) usually comes around April 30 and the first fall freeze around October 9: a growing season of about 161 days.

One fall in ten brings a freeze by September 24; one spring in ten still has one after May 16.

Climate of 44.41, -88.00: normals, records and every month

Everything else on the grid

NWS forecast grid · 27 elements

The forecast office edits about sixty fields for every cell of its grid. The common ones are above; these are the rest, as the daily extreme, for anyone who needs the mixing height, the fire danger or the swell.

ElementMonTueWedThuFriSatSunMon
HeatRisk max0 · Little1 · Minor1 · Minor1 · Minor0 · Little0 · Little0 · Little0 · Little
Wet bulb globe temperature max69°68°65°63°59°61°59°58°
Heat index max73°73°
Wind chill min50°45°44°45°44°
Chance of thunder max0%7%19%17%3%2%5%5%
Visibility min8 mi1.0 mi
Mixing height max3,200 ft2,900 ft1,400 ft3,700 ft4,200 ft3,400 ft2,900 ft2,900 ft
Transport wind max7 mph15 mph17 mph15 mph10 mph10 mph12 mph12 mph

Against the record

NOAA GHCN · Ashwaubenon (GRB) · 8.2 mi away

Each forecast day against the same calendar date at the nearest long-record station: the 1991 to 2020 normal, and the record high and low with the year they were set.

DayForecastNormalRecord highRecord low
Mon Sep 2873° / 50°—80° (2015)35° (2012)
Tue Sep 2973° / 60°—83° (2025)34° (2004)
Wed Sep 3068° / 61°—83° (2019)33° (2009)
Thu Oct 167° / 46°—86° (2023)33° (2009)
Fri Oct 262° / 44°—86° (2023)32° (2011)
Sat Oct 363° / 47°—87° (2025)31° (2008)
Sun Oct 462° / 45°—86° (2025)29° (2008)
Mon Oct 560° / 44°—86° (2007)26° (2004)

Sun and moon

DayCivil twilightSunriseSunsetCivil twilightDaylightMoon
Mon6:17 AM6:46 AM6:38 PM7:07 PM11 h 52 min Waning gibbous · 95% lit
Tue6:19 AM6:48 AM6:36 PM7:05 PM11 h 48 min Waning gibbous · 90% lit
Wed6:20 AM6:49 AM6:34 PM7:03 PM11 h 45 min Waning gibbous · 82% lit
Thu6:21 AM6:50 AM6:32 PM7:01 PM11 h 42 min Waning gibbous · 73% lit
Fri6:22 AM6:51 AM6:31 PM7:00 PM11 h 40 min Waning gibbous · 64% lit
Sat6:23 AM6:52 AM6:29 PM6:58 PM11 h 37 min Last quarter · 53% lit
Sun6:25 AM6:54 AM6:27 PM6:56 PM11 h 33 min Last quarter · 43% lit
Mon6:26 AM6:55 AM6:25 PM6:54 PM11 h 30 min Waning crescent · 32% lit

Forecast from the National Weather Service forecast grid at api.weather.gov, updated by the local office through the day; the written periods and hourly digest are the NWS’s own. Outlooks from the Storm Prediction Center, the Weather Prediction Center and the Climate Prediction Center via NOAA’s map services. Records and normals from NOAA’s Global Historical Climatology Network. Sun and moon computed here. Place names from GeoNames (CC BY 4.0).

What is here

Seven days
The high, the low, the chance and amount of rain and snow, the wind and the forecaster’s words for each day and night, from the National Weather Service grid for the exact cell your town sits in.
Hour by hour
Temperature, what it feels like, dew point, humidity, chance and amount of precipitation, wind and gusts, sky cover, the chance of thunder, pressure, visibility and ceiling, as a chart and as a table, with nights shaded.
Everything else on the grid
The office edits about sixty fields for every cell. The ones the mainstream forecast pages leave out are here as a daily table: HeatRisk, wet bulb globe temperature, lightning activity, mixing height, transport wind, the fire weather indices, and at the coast the waves and swell.
The discussion
The Area Forecast Discussion the forecaster wrote to explain the forecast, in their own words, with the specialist annexes folded away. Also the office’s hazardous weather outlook.
Beyond the week
The Storm Prediction Center’s severe weather category for each of the next eight days, the Weather Prediction Center’s rainfall forecast to day seven and its winter storm severity, and the Climate Prediction Center’s odds for days six to fourteen, all read at your coordinate.
Against the record
Each forecast day beside the same date at the nearest long-record station: the thirty-year normal and the record high and low with their years, so a forecast high that would break a record says so.
The next 90 days
The forecast as far as the grid, the National Blend and the global models reach, and the calendar after that: the normal and the record for every date, with the Climate Prediction Center’s lean for the weeks, the month and the season drawn over them. No made-up highs for a date three months out.

Common questions

Where does this forecast come from?

From the National Weather Service forecast grid published at api.weather.gov, the same grid the local forecast office edits through the day and the source of every forecast on weather.gov. The written periods, the hourly digest and the forecaster’s discussion are the NWS’s own products, shown as issued. Nothing here is a blend a website made.

How far ahead does it go?

The grid runs seven days ahead, hour by hour for the first days and in three to six hour steps after that. The National Blend of Models carries the days to eleven and the global models to sixteen. Beyond that the page carries the national centers’ outlooks, severe weather to day eight, rainfall to day seven, and the Climate Prediction Center’s odds for the coming weeks, month and season, over a ninety-day calendar of the normal and the record for each date. No forecast has skill day by day past about two weeks, and this page does not print one.

Why is this different from the app on my phone?

Most forecast apps show a blend of models chosen by the company that makes the app. This page shows the forecast the local National Weather Service office issues, edited by the forecasters who will also issue the warnings, and it shows all of it rather than the six numbers that fit on a phone. The discussion explains the reasoning, which no app carries.

What is a place’s address here?

Every town has its own page, such as /forecast/us/oklahoma/oklahoma-city/, and every day at a town has one too. A ZIP code typed into the search goes to the town it belongs to. Any coordinate at all can be looked up, and the page names the nearest town.

What the weather actually was · Open the live radar · Where the data comes from