Duluth, MN Weather & Growing Conditions
Tonight
52°F
Rain
Rain. Cloudy. Low around 52, with temperatures rising to around 54 overnight. Northeast wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Rain | 15 to 20 mph NE | 85% |
| Wednesday | 53°F | Rain | 10 to 20 mph N | 91% |
| Wednesday Night | 45°F | Light Rain | 15 to 20 mph N | 84% |
| Thursday | 48°F | Chance Light Rain then Mostly Cloudy | 15 to 20 mph N | 44% |
| Thursday Night | 38°F | Mostly Cloudy | 10 to 15 mph NE | 1% |
| Friday | 40°F | Mostly Sunny | 5 to 10 mph E | 0% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 46°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Saturday Night | 40°F | Partly Cloudy | 10 mph W | 13% |
| Sunday | 49°F | Mostly Sunny | 10 mph W | 10% |
| Sunday Night | 40°F | Partly Cloudy | 5 to 10 mph SW | 3% |
| Monday | 51°F | Mostly Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 41°F | Partly Cloudy | 10 to 15 mph W | 0% |
| Tuesday | 47°F | Mostly Sunny | 5 to 10 mph W | 0% |
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 Nov 4, 2026.