47.8940, -91.8630

1. Sun9 PM55°2 mph
2. 10 PM54°2 mph
3. 11 PM52°2 mph
4. Mon12 AM50°1 mph
5. 1 AM49°1 mph
6. 2 AM49°1 mph
7. 3 AM48°1 mph
8. 4 AM47°1 mph
9. 5 AM46°1 mph
10. 6 AM45°1 mph
11. 7 AM45°1%1 mph
12. 8 AM47°1%1 mph
13. 9 AM51°1%2 mph
14. 10 AM55°1%2 mph
15. 11 AM60°1%3 mph
16. 12 PM64°1%3 mph
17. 1 PM66°2%5 mph
18. 2 PM67°2%5 mph
19. 3 PM67°2%5 mph
20. 4 PM68°2%5 mph
21. 5 PM67°2%5 mph
22. 6 PM64°2%5 mph
23. 7 PM59°8%5 mph
24. 8 PM57°9%6 mph
25. 9 PM56°3%6 mph
26. 10 PM55°11%7 mph
27. 11 PM55°29%7 mph
28. Tue12 AM55°29%7 mph
29. 1 AM57°19%7 mph
30. 2 AM57°3%7 mph
31. 3 AM56°1%8 mph
32. 4 AM58°2%8 mph
33. 5 AM58°32%9 mph
34. 6 AM58°56%9 mph
35. 7 AM58°87%10 mph
36. 8 AM59°87%10 mph
37. 9 AM59°87%10 mph
38. 10 AM60°87%10 mph
39. 11 AM60°87%10 mph
40. 12 PM61°87%10 mph
41. 1 PM62°79%10 mph
42. 2 PM63°79%9 mph
43. 3 PM64°79%9 mph
44. 4 PM65°79%8 mph
45. 5 PM64°79%7 mph
46. 6 PM63°79%7 mph
47. 7 PM61°23%6 mph
48. 8 PM60°23%6 mph

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

1. TodaySep 2768°45°Partly Cloudy then Patchy Fog1%wind 6 mph · gusts 12 mph
2. MonSep 2868°55°Patchy Fog then Partly Sunny29%wind 7 mph · gusts 16 mph
3. TueSep 2965°53°Showers And Thunderstorms87%0.22 inwind 10 mph · gusts 23 mph
4. WedSep 3070°48°Partly Sunny then Slight Chance Rain Showers23%0.02 inwind 8 mph · gusts 17 mph
5. ThuOct 158°38°Partly Sunny15%wind 15 mph · gusts 26 mph
6. FriOct 257°37°Mostly Sunny3%wind 10 mph · gusts 21 mph
7. SatOct 357°38°Partly Sunny24%wind 8 mph · gusts 18 mph
8. SunOct 453°35°Slight Chance Rain Showers24%wind 9 mph · gusts 20 mph
9. MonOct 554°39°National Blend7%wind 7 mph · gusts 15 mph
10. TueOct 657°40°National Blend11%wind 9 mph · gusts 18 mph
11. WedOct 759°40°National Blend8%wind 8 mph · gusts 17 mph
12. ThuOct 8~50°39°Model mean0.04 in
13. FriOct 9~49°34°Model mean
14. SatOct 10~50°35°Model mean0.03 in
15. SunOct 11~49°35°Model mean
16. MonOct 12~44°41°Model mean0.07 in

• Feels like55°
• WindW 2 mphgusts 7 mph
• Radar over this pointno reading
• Humidity96%
• Dew point54°
• Pressure—
• UV index—
• Air quality—
• Visibility10 mi
• Sunrise and sunsetSunrise · Sunset · set
• Moonrise6:59 PMMoonset 8:14 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 27—45°NWS grid 68° / 45°rain 1%wind 6 mph · gusts 14 mph
2. MonSep 2868°55°NWS grid 68° / 55°rain 37%wind 7 mph · gusts 16 mph
3. TueSep 2964°53°NWS grid 65° / 53°rain 87%thunder 19%0.22 inwind 10 mph · gusts 23 mph
4. WedSep 3068°48°NWS grid 70° / 48°rain 26%0.02 inwind 8 mph · gusts 17 mph
5. ThuOct 158°39°NWS grid 58° / 38°rain 8%wind 14 mph · gusts 26 mph
6. FriOct 256°38°NWS grid 57° / 37°rain 2%wind 10 mph · gusts 20 mph
7. SatOct 356°39°NWS grid 57° / 38°rain 24%wind 8 mph · gusts 18 mph
8. SunOct 452°36°NWS grid 53° / 35°rain 21%wind 9 mph · gusts 20 mph
9. MonOct 554°39°Beyond the NWS gridrain 7%wind 7 mph · gusts 15 mph
10. TueOct 657°40°Beyond the NWS gridrain 11%wind 9 mph · gusts 18 mph
11. WedOct 759°40°Beyond the NWS gridrain 8%wind 8 mph · gusts 17 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.

The sun is down, so each rating says which span it is for: tomorrow’s daylight, tonight, or the next 24 hours.

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

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: fly with caution (night: lighting and night training required (107.29)). Next good stretch: Mon 10 AM to 6 PM, 8 hours.

Today: civil twilight for Part 107 6:31 AM to sunrise 7:01 AM, and sunset 6:55 PM to 7:25 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

• Mon 11 AM to 8 PM 9 hours, every hour within the rules
• Wed 6 PM to 9 PM 3 hours, every hour within the rules
• Thu 11 PM to Fri 2 AM 3 hours, every hour within the rules
• Fri 6 PM to 8 PM 2 hours, every hour within the rules
• Sat 9 AM to 12 PM 3 hours, every hour within the rules
• Sat 7 PM to 10 PM 3 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. Tonight45° · 0 mph

   Patchy fog after 4am. Partly cloudy, with a low around 45. Northwest wind around 0 mph.

2. Monday68° · 2% · SE 0–5 mph

   Patchy fog before 9am. Partly sunny, with a high near 68. Southeast wind 0 to 5 mph.

3. Monday Night55° · 32% · S 5–10 mph

   A chance of rain showers after 11pm. Cloudy. Low around 55, with temperatures rising to around 58 overnight. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

4. Tuesday65° · 87% · S 5–10 mph

   Rain showers likely before 7am, then showers and thunderstorms. Cloudy, with a high near 65. South wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

5. Tuesday Night53° · 79% · S 5 mph

   Rain showers before 1am. Mostly cloudy, with a low around 53. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

6. Wednesday70° · 19% · SW 5–10 mph

   A slight chance of rain showers after 1pm. Partly sunny, with a high near 70. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. New rainfall amounts less than a tenth of an inch possible.

7. Wednesday Night48° · 19% · W 5 mph

   A slight chance of rain showers before 1am. Mostly cloudy, with a low around 48. West wind around 5 mph.

8. Thursday58° · 6% · W 5–15 mph

   Partly sunny, with a high near 58. West wind 5 to 15 mph, with gusts as high as 30 mph.

9. Thursday Night38° · 3% · W 5–10 mph

   Partly cloudy, with a low around 38. West wind 5 to 10 mph, with gusts as high as 25 mph.

10. Friday57° · 2% · W 5–10 mph

    Mostly sunny, with a high near 57. West wind 5 to 10 mph, with gusts as high as 25 mph.

11. Friday Night37° · 2% · W 0–5 mph

    Partly cloudy, with a low around 37. West wind 0 to 5 mph.

12. Saturday57° · 10% · S 5–10 mph

    Partly sunny, with a high near 57. South wind 5 to 10 mph, with gusts as high as 20 mph.

13. Saturday Night38° · 24% · S 5 mph

    A slight chance of rain showers after 7pm. Mostly cloudy, with a low around 38. South wind around 5 mph, with gusts as high as 20 mph.

14. Sunday53° · 21% · SW 5–10 mph

    A slight chance of rain showers. Partly sunny, with a high near 53. Southwest wind 5 to 10 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 272156
HWODLH

Hazardous Weather Outlook
National Weather Service Duluth MN
456 PM CDT Sun Sep 27 2026

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-282200-
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-
456 PM CDT Sun Sep 27 2026

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

.DAY ONE...Tonight

Areas of dense fog with visibility 1/4 mile or less may develop
tonight south of a line from Walker to Duluth to Hurley.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Fog will dissipate by late Monday morning.

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. Occasional cloud-to-ground lightning is the main threat 
from storms.

Cooler temperatures Thursday night through next weekend will pose
a risk of frost.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotter activation will not be needed tonight.

$$

LSZ121-140>148-150-282200-
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-
456 PM 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...Tonight

Dense fog with visibility 1 mile or less may develop early Monday
morning near the Twin Ports and portions of the north shore
waters.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Fog will dissipate by 10 AM.

Gusty southerly winds Tuesday afternoon and evening may become 
hazardous for small craft along the North Shore near Grand
Portage
and also along the South Shore

Winds become northwest and strengthen for Thursday. Hazardous 
conditions could redevelop each day from Friday through next 
Sunday. Small Craft Advisories may be needed each day.

$$

Huyck

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 24 and the first fall freeze around September 23: a growing season of about 121 days.

One fall in ten brings a freeze by September 7; one spring in ten still has one after June 4.

Climate of 47.89, -91.86: 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.