Duluth, MN Weather & Growing Conditions
This Afternoon
59°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. High near 59, with temperatures falling to around 54 in the afternoon. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tonight | 52°F | Chance Rain Showers then Chance Drizzle | 5 to 10 mph NE | 31% |
| Saturday | 61°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NE | 21% |
| Saturday Night | 51°F | Mostly Cloudy | 5 mph NE | 2% |
| Sunday | 59°F | Partly Sunny | 5 to 15 mph NE | 0% |
| Sunday Night | 45°F | Mostly Cloudy | 5 to 10 mph E | 0% |
| Monday | 58°F | Mostly Sunny | 5 to 15 mph E | 0% |
| Monday Night | 42°F | Partly Cloudy | 5 to 10 mph E | 0% |
| Tuesday | 60°F | Sunny | 0 to 10 mph E | 0% |
| Tuesday Night | 43°F | Mostly Clear | 0 to 10 mph E | 0% |
| Wednesday | 63°F | Sunny | 0 to 5 mph E | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 0 to 5 mph E | 6% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph SE | 10% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NW | 5% |
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 Sep 19, 2026.