Duluth, MN Weather & Growing Conditions
Today
51°F
Rain
Rain and areas of fog. Cloudy, with a high near 51. Northeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Rain | 10 mph NE | 90% |
| Tonight | 40°F | Light Rain | 10 to 15 mph N | 90% |
| Thursday | 43°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 22% |
| Thursday Night | 29°F | Mostly Cloudy | 5 to 10 mph N | 1% |
| Friday | 39°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Friday Night | 25°F | Mostly Clear | 0 mph | 0% |
| Saturday | 43°F | Mostly Sunny | 0 to 10 mph SW | 2% |
| Saturday Night | 34°F | Partly Cloudy | 5 to 10 mph W | 7% |
| Sunday | 48°F | Mostly Sunny | 5 to 10 mph W | 3% |
| Sunday Night | 34°F | Partly Cloudy | 5 mph SW | 0% |
| Monday | 52°F | Partly Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 48°F | Mostly Sunny | 5 mph NW | 4% |
| Tuesday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Duluth, MN
Last spring frost
May 6
First fall frost
Oct 9
Growing season
154 days
Hardiness zone
4b
Explore more for Duluth, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Superior, Wi (8.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.