Hermantown, MN Weather & Growing Conditions
Overnight
56°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy, with a low around 56. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Rain Showers | 15 mph NW | 24% |
| Tuesday | 72°F | Mostly Sunny | 10 to 15 mph NW | 8% |
| Tuesday Night | 51°F | Mostly Clear | 0 to 10 mph W | 0% |
| Wednesday | 76°F | Sunny | 5 to 10 mph SW | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 5 to 10 mph SW | 3% |
| Thursday | 82°F | Sunny | 10 to 15 mph SW | 8% |
| Thursday Night | 61°F | Mostly Clear | 10 mph SW | 5% |
| Friday | 83°F | Sunny then Slight Chance Showers And Thunderstorms | 10 mph SW | 19% |
| Friday Night | 58°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 30% |
| Saturday | 77°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NW | 21% |
| Saturday Night | 58°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 33% |
| Sunday | 76°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NW | 22% |
| Sunday Night | 57°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph N | 17% |
| Monday | 76°F | Slight Chance Rain Showers | 5 to 10 mph N | 20% |
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 Aug 4, 2026.