Duluth, MN Weather & Growing Conditions
Today
72°F
Mostly Sunny
Mostly sunny, with a high near 72. West wind 5 to 10 mph, with gusts as high as 20 mph. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 5 to 10 mph W | 9% |
| Tonight | 51°F | Mostly Clear | 0 to 5 mph W | 0% |
| Wednesday | 76°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Thursday | 83°F | Sunny | 10 to 15 mph SW | 6% |
| Thursday Night | 63°F | Mostly Clear | 10 mph SW | 6% |
| Friday | 85°F | Sunny then Slight Chance Showers And Thunderstorms | 10 mph SW | 17% |
| Friday Night | 59°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 29% |
| Saturday | 78°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 17% |
| Saturday Night | 59°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph NW | 38% |
| Sunday | 76°F | Slight Chance Showers And Thunderstorms | 5 mph NW | 23% |
| Sunday Night | 58°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 17% |
| Monday | 76°F | Slight Chance Rain Showers | 0 to 5 mph N | 21% |
| Monday Night | 57°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 19% |
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 Aug 4, 2026.