Duluth, MN Weather & Growing Conditions
Today
52°F
Light Rain
Rain and areas of fog. Cloudy, with a high near 52. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Light Rain | 10 mph NE | 78% |
| Tonight | 39°F | Light Rain | 10 to 15 mph N | 86% |
| Thursday | 43°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 16% |
| Thursday Night | 29°F | Mostly Cloudy | 5 to 10 mph N | 1% |
| Friday | 40°F | Sunny | 0 to 5 mph E | 0% |
| Friday Night | 27°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Saturday | 45°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 2% |
| Sunday | 50°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 36°F | Partly Cloudy | 5 mph SW | 0% |
| Monday | 55°F | Mostly Sunny | 5 to 15 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 1% |
| Tuesday | 49°F | Mostly Sunny | 5 to 10 mph W | 2% |
| Tuesday Night | 35°F | Partly Cloudy | 5 mph NW | 1% |
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
4b
Explore more for Duluth, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Duluth Harbor Stn, Mn (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.