48.0780, -90.7600

1. Sun11 AM60°18%6 mph
2. 12 PM61°20%6 mph
3. 1 PM64°22%5 mph
4. 2 PM64°15%5 mph
5. 3 PM66°8%5 mph
6. 4 PM66°5 mph
7. 5 PM65°3 mph
8. 6 PM63°2 mph
9. 7 PM60°2 mph
10. 8 PM55°2 mph
11. 9 PM54°2 mph
12. 10 PM53°2 mph
13. 11 PM51°2 mph
14. Mon12 AM51°2 mph
15. 1 AM50°1 mph
16. 2 AM49°1 mph
17. 3 AM48°1 mph
18. 4 AM47°1 mph
19. 5 AM46°1 mph
20. 6 AM45°1 mph
21. 7 AM45°1 mph
22. 8 AM48°1 mph
23. 9 AM52°2 mph
24. 10 AM59°2 mph
25. 11 AM63°3 mph
26. 12 PM65°5 mph
27. 1 PM68°6 mph
28. 2 PM68°6 mph
29. 3 PM68°6 mph
30. 4 PM68°6 mph
31. 5 PM65°1%5 mph
32. 6 PM63°2%5 mph
33. 7 PM58°3%5 mph
34. 8 PM53°4%3 mph
35. 9 PM52°5%5 mph
36. 10 PM53°6%5 mph
37. 11 PM52°10%5 mph
38. Tue12 AM52°14%5 mph
39. 1 AM52°26%5 mph
40. 2 AM52°26%5 mph
41. 3 AM53°23%5 mph
42. 4 AM53°28%6 mph
43. 5 AM53°31%6 mph
44. 6 AM53°43%6 mph
45. 7 AM54°52%6 mph
46. 8 AM55°52%6 mph
47. 9 AM57°52%7 mph
48. 10 AM59°52%7 mph

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

1. TodaySep 2767°51°Slight Chance Rain Showers58%0.02 inwind 7 mph · gusts 14 mph
2. MonSep 2869°50°Areas Of Fog then Sunny10%wind 6 mph · gusts 13 mph
3. TueSep 2965°51°Showers And Thunderstorms82%0.25 inwind 7 mph · gusts 18 mph
4. WedSep 3070°47°Partly Sunny45%wind 6 mph · gusts 17 mph
5. ThuOct 163°36°Mostly Sunny13%wind 9 mph · gusts 24 mph
6. FriOct 260°36°Mostly Sunny4%wind 6 mph · gusts 17 mph
7. SatOct 359°36°Partly Sunny21%wind 6 mph · gusts 17 mph
8. SunOct 455°32°25%wind 7 mph · gusts 18 mph
9. MonOct 556°34°National Blend5%wind 5 mph · gusts 14 mph
10. TueOct 661°37°National Blend10%wind 6 mph · gusts 18 mph
11. WedOct 762°38°National Blend10%wind 5 mph · gusts 16 mph
12. ThuOct 8~46°33°Model mean0.01 in
13. FriOct 9~50°33°Model mean
14. SatOct 10~57°41°Model mean0.27 in
15. SunOct 11~63°48°Model mean0.01 in
16. MonOct 12~59°43°Model mean

• Feels like60°
• WindSW 6 mphgusts 13 mph
• Radar over this pointno reading
• Humidity86%
• Dew point56°
• Pressure—
• UV index—
• Air quality—
• Visibility10 mi
• Sunrise and sunsetSunrise · Sunset
• Moonrise6:54 PMMoonset 8:09 AM
• Moon phaseWaning gibbous99% lit

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 2770°44°NWS grid 67° / 51°rain 30%wind 3 mph · gusts 13 mph
2. MonSep 2870°51°NWS grid 69° / 50°rain 37%wind 3 mph · gusts 14 mph
3. TueSep 2966°51°NWS grid 65° / 51°rain 77%thunder 15%0.27 inwind 7 mph · gusts 21 mph
4. WedSep 3071°48°NWS grid 70° / 47°rain 17%0.01 inwind 6 mph · gusts 16 mph
5. ThuOct 163°36°NWS grid 63° / 36°rain 14%wind 9 mph · gusts 25 mph
6. FriOct 260°35°NWS grid 60° / 36°rain 6%wind 7 mph · gusts 20 mph
7. SatOct 360°37°NWS grid 59° / 36°rain 26%wind 6 mph · gusts 16 mph
8. SunOct 456°32°NWS grid 55° / 32°rain 26%wind 7 mph · gusts 20 mph
9. MonOct 556°34°Beyond the NWS gridrain 5%wind 5 mph · gusts 14 mph
10. TueOct 661°37°Beyond the NWS gridrain 10%wind 6 mph · gusts 18 mph
11. WedOct 762°38°Beyond the NWS gridrain 10%wind 5 mph · gusts 16 mph

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.

NWS gridBlendHRRRGFSGEFS ± spreadECMWFECMWF AI

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

ECMWF ensemble meteogram

10 daysTemperature plume

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 Mon Oct 12, from the NWS grid, then the National Blend, then the mean of the global models. Beyond it the lines are the calendar.

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

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.

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

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 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.

This hour: good to fly. Next good stretch: Sun 11 AM to 6 PM, 7 hours.

Today: civil twilight for Part 107 6:27 AM to sunrise 6:57 AM, and sunset 6:50 PM to 7:20 PM. Anti-collision lighting is required in those minutes and at night.

Good Caution No-fly

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.

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

• Sun 3 PM to 6 PM 3 hours, every hour within the rules
• Mon 11 AM to 8 PM 9 hours, every hour within the rules
• Wed 12 PM to 2 PM 2 hours, every hour within the rules
• Wed 6 PM to 9 PM 3 hours, every hour within the rules
• Fri 10 AM to 12 PM 2 hours, every hour within the rules
• Fri 5 PM to 7 PM 2 hours, every hour within the rules
• Sat 10 AM to 12 PM 2 hours, every hour within the rules
• Sat 7 PM to 9 PM 2 hours, every hour within the rules

Good Marginal No

Field days

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.

The best-rated day this week is Sunday, rated best.

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.

1. Today67° · 22% · SW 5 mph

   A slight chance of rain showers before 3pm. Partly sunny. High near 67, with temperatures falling to around 65 in the afternoon. Southwest wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

2. Tonight44° · 0 mph

   Patchy fog after 3am. Mostly clear. Low around 44, with temperatures rising to around 46 overnight. Northwest wind around 0 mph.

3. Monday69° · 1% · SE 0–5 mph

   Areas of fog before 9am. Sunny. High near 69, with temperatures falling to around 65 in the afternoon. Southeast wind 0 to 5 mph.

4. Monday Night50° · 31% · S 5 mph

   A chance of rain showers after 1am. Mostly cloudy, with a low around 50. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

5. Tuesday65° · 82% · S 5 mph

   A chance of rain showers before 1pm, then showers and thunderstorms. Cloudy, with a high near 65. South wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

6. Tuesday Night51° · 82% · SW 0–5 mph

   Showers and thunderstorms before 1am. Cloudy, with a low around 51. Southwest wind 0 to 5 mph. New rainfall amounts between a tenth and quarter of an inch possible.

7. Wednesday70° · 9% · SW 0–5 mph

   Partly sunny, with a high near 70. Southwest wind 0 to 5 mph, with gusts as high as 20 mph.

8. Wednesday Night47° · 13% · W 5 mph

   Partly cloudy, with a low around 47. West wind around 5 mph.

9. Thursday63° · 9% · W 5–10 mph

   Mostly sunny, with a high near 63. West wind 5 to 10 mph, with gusts as high as 25 mph.

10. Thursday Night36° · 4% · NW 0–5 mph

    Mostly clear, with a low around 36. Northwest wind 0 to 5 mph, with gusts as high as 25 mph.

11. Friday60° · 3% · W 0–5 mph

    Mostly sunny, with a high near 60. West wind 0 to 5 mph, with gusts as high as 20 mph.

12. Friday Night36° · 6% · S 0–5 mph

    Partly cloudy, with a low around 36. South wind 0 to 5 mph.

13. Saturday59° · 13% · S 0–5 mph

    Partly sunny, with a high near 59. South wind 0 to 5 mph, with gusts as high as 20 mph.

14. Saturday Night36° · 25% · SW 0–5 mph

    A chance of rain showers after 7pm. Mostly cloudy, with a low around 36. Southwest wind 0 to 5 mph, with gusts as high as 20 mph.

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.

FLUS43 KDLH 270818
HWODLH

Hazardous Weather Outlook
National Weather Service Duluth MN
318 AM CDT Sun Sep 27 2026

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-281000-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
318 AM CDT Sun Sep 27 2026

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Gusty northeast winds over western Lake Superior are likely again
Monday afternoon, which may create hazardous swimming conditions.

Thunderstorms may affect parts of the Northland Monday night into
Tuesday. 

.SPOTTER INFORMATION STATEMENT...

Skywarn spotter activation will not be needed today or tonight.

$$

LSZ121-140>148-150-281000-
Bayfield to Oak Point WI-Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
318 AM CDT Sun Sep 27 2026

This Hazardous Weather Outlook is for portions of Lake Superior
and the Nearshore waters of western Lake Superior.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A period of potentially hazardous conditions for small craft are
expected Tuesday through Thursday this week. Small Craft Advisories
may be needed. Gusty southerly winds Tuesday and again Wednesday 
may become hazardous for along the North Shore near Grand Portage,
and also along the South Shore. Winds become northwest and
strengthen for Thursday. 

Hazardous conditions could redevelop during the day and evening 
hours Friday and next Saturday as well.

$$

LE

More information may be obtained at the following web address: 
http://www.weather.gov/duluth

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

The last spring freeze (32°F) usually comes around May 23 and the first fall freeze around September 26: a growing season of about 124 days.

One fall in ten brings a freeze by September 11; one spring in ten still has one after June 7.

Climate of 48.08, -90.76: normals, records and every month

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.

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.