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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.