Duluth, MN 55815 Weather

St. Louis County5:32 AM CDT46.78°N, 92.11°W

Current conditions

Partly Cloudy
45°
Partly Cloudy
Feels like 45°
High 66°·Low 45° tonight
WindCalm
Humidity93%
Dew point43°
Pressure30.12 inHg
Visibility10.0 mi
Cloud cover62%
UV index0 Low
Sunrise7:35 AM
Sunset6:12 PM

Observed at Duluth - Sky Harbor Airport · 57 min ago

Forecast

10-day

  • Overnight

    Mostly cloudy, with a low around 45. West wind around 5 mph.

  • Wednesday

    Mostly sunny. High near 66, with temperatures falling to around 64 in the afternoon. West wind around 5 mph.

  • Wednesday Night

    Mostly clear, with a low around 45. Northeast wind around 5 mph.

National Weather Service forecast updated 4 hrs ago.

Hourly

Hourly forecast
  1. Now Mostly Cloudy 45°
  2. 6 AM Partly Sunny 45°
  3. 7 AM Mostly Cloudy 45°
  4. 8 AM Partly Sunny 45°
  5. 9 AM Mostly Sunny 48°
  6. 10 AM Sunny 52°
  7. 11 AM Sunny 56°
  8. 12 PM Sunny 60°
  9. 1 PM Sunny 63°
  10. 2 PM Sunny 66°
  11. 3 PM Sunny 66°
  12. 4 PM Sunny 66°
  13. 5 PM Sunny 64°
  14. 6 PM Mostly Clear 60°
  15. 7 PM Mostly Clear 56°
  16. 8 PM Mostly Clear 53°
  17. 9 PM Mostly Clear 52°
  18. 10 PM Mostly Clear 51°
  19. 11 PM Mostly Clear 51°
  20. Thu12 AM Mostly Clear 50°
  21. 1 AM Mostly Clear 49°
  22. 2 AM Mostly Clear 49°
  23. 3 AM Mostly Clear 47°
  24. 4 AM Partly Cloudy 46°

10-day forecast

Details
  1. TonightOct 20 Mostly Cloudy Mostly Cloudy45°
  2. TodayOct 21 Mostly Sunny Mostly Sunny45°66°
  3. ThuOct 22 Mostly Sunny Mostly Sunny47°60°
  4. FriOct 23 Partly Sunny Partly Sunny24%56°66°
  5. SatOct 24 Chance Rain Showers Chance Rain Showers37%44°69°
  6. SunOct 25 Mostly Sunny Mostly Sunny19%37°53°
  7. MonOct 26 Slight Chance Rain Showers Slight Chance Rain Showers19%34°48°
  8. TueOct 27 Mostly Sunny Mostly Sunny14%49°
  9. WedOct 28 Mostly sunny Mostly sunny37°53°
  10. ThuOct 29 Partly cloudy Partly cloudy40°55°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Duluth

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Air quality

33
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • WedGood (33)
  • ThuGood
  • FriGood

Duluth Area, MN reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:35 AM
Sunset 6:12 PM
Daylight 10 h 37 min (−3 min 10 s tomorrow)
Waxing Gibbous · 76% lit
Moonrise 4:08 PM Moonset 2:17 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low50° / 34°
Record high80° (1901)
Record low14° (1913)
Wettest1.24 in (2019)
Yesterday63° / 38°
Month to date0.91 in (normal 2.01 in)

Duluth Area, records since 1874. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in DLH, issued 3 hrs ago

Key Messages

- Above normal temperatures through Saturday.

- Next chance of rain (20-40%) is Friday afternoon into Saturday.

- Near-normal temperatures return Sunday.

Discussion

Issued at 210 AM CDT Wed Oct 21 2026

Current Conditions/Today:

Low pressure is moving across northern Ontario this morning with a cold front trailing into northern MN. Radar returns show some weak echoes across northern MN but with the dry air in the low levels we don't anticipate any of this activity to make it to the surface. The frontal boundary will march slowly across the Northland today with winds turning from southerly to northerly with its passage. High pressure will build in behind the boundary with cloud cover largely clearing out by mid day. This will allow ample time for temperatures to recover with another warm day expected as afternoon high temperatures climb into the 60s and low 70s. Overnight, radiational cooling paired with lightly mixed winds and low level moisture could lead to areas of fog developing (30-50% chance).

Tomorrow:

Transient surface high pressure will drift eastward across the region Thursday as an upper-level ridge builds over the northern Plains and Canadian Prairies. Temperatures will remain well above normal as winds turn southerly. Lows Thursday morning will range from the low 30s to around 40 degrees. Look for highs in the low 60s to low 70s, about 10-20 degrees above normal. Temps will be cooler for portions of the North Shore and Arrowhead due to on-shore flow. Those readings will be 5-10 degrees above normal with highs in the middle 50s to low 60s.

Friday through Sunday Night:

Aviation

Issued at 1230 AM CDT Wed Oct 21 2026

A weak cold front is advancing in from the northwest this morning. Radar is showing some weak echoes associated with this boundary but not expecting any precipitation at the surface. Mid and upper level clouds will clear out through the morning hours as high pressure builds in behind the boundary. Expect winds to be light and out of the north as the behind the front. Additionally, northern MN still has a few more hours under the influence of a low level wind shear at the start of the TAF period.

Marine

Issued at 210 AM CDT Wed Oct 21 2026

Southwest winds through the day around 5 to 10 knots. A front will pass over the Lake switching winds to out of the northeast tonight. Winds will continue to be on the light side until late Friday when southerly winds ramp up and could lead to hazardous boating conditions for small vessels.

For the open water discussion, refer to the NWS Marquette Area Forecast Discussion at weather.gov/mqt.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.