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Duluth, MN Weather & Growing Conditions

Today
59°F
Patchy Fog then Cloudy
Patchy fog before 9am. Cloudy. High near 59, with temperatures falling to around 56 in the afternoon. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

7-day forecast

WhenTempForecastWindPrecip
Today 59°F Patchy Fog then Cloudy 10 to 15 mph NE 8%
Tonight 54°F Mostly Cloudy 5 to 15 mph NE 4%
Sunday 59°F Partly Sunny 15 to 25 mph NE 2%
Sunday Night 50°F Mostly Cloudy 10 to 15 mph E 0%
Monday 58°F Mostly Sunny 10 to 20 mph E 0%
Monday Night 46°F Mostly Clear 5 to 20 mph E 0%
Tuesday 58°F Sunny 5 to 15 mph E 0%
Tuesday Night 46°F Mostly Clear 0 to 15 mph E 0%
Wednesday 61°F Sunny 0 to 15 mph E 0%
Wednesday Night 49°F Mostly Clear 0 to 15 mph E 3%
Thursday 63°F Mostly Sunny 0 to 10 mph E 4%
Thursday Night 52°F Partly Cloudy 0 to 10 mph E 4%
Friday 66°F Mostly Sunny 0 to 10 mph E 4%
Friday Night 54°F Partly Cloudy 5 to 10 mph E 7%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Duluth, MN

Last spring frost
May 14
First fall frost
Oct 12
Growing season
149 days
Hardiness zone
5a

Explore more for Duluth, MN: full frost dates · planting calendar · Minnesota frost dates

Climate data from the nearest NOAA station, Duluth Harbor Stn, Mn (0.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.