Hermantown, MN Weather & Growing Conditions
This Afternoon
58°F
Rain
Rain and patchy fog. Cloudy. High near 58, with temperatures falling to around 53 in the afternoon. North wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Rain | 10 mph N | 79% |
| Tonight | 49°F | Rain | 10 mph NE | 86% |
| Wednesday | 52°F | Rain | 10 to 15 mph NE | 92% |
| Wednesday Night | 40°F | Light Rain | 10 to 15 mph N | 83% |
| Thursday | 43°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 32% |
| Thursday Night | 28°F | Mostly Cloudy | 5 to 10 mph NE | 0% |
| Friday | 39°F | Mostly Sunny | 5 mph E | 0% |
| Friday Night | 26°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 46°F | Mostly Sunny | 0 to 10 mph SW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 5 to 10 mph W | 13% |
| Sunday | 49°F | Mostly Sunny | 10 mph W | 10% |
| Sunday Night | 33°F | Partly Cloudy | 5 mph SW | 2% |
| Monday | 51°F | Mostly Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 35°F | Partly Cloudy | 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hermantown, MN
Last spring frost
May 18
First fall frost
Oct 1
Growing season
135 days
Hardiness zone
4b
Explore more for Hermantown, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Duluth Nws, Mn (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.