Herman, MN Weather & Growing Conditions
Tonight
40°F
Light Rain
Rain before 1am, then rain and patchy fog. Cloudy. Low around 40, with temperatures rising to around 43 overnight. North northwest wind 15 to 18 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Light Rain | 15 to 18 mph NNW | 88% |
| Wednesday | 45°F | Light Rain | 20 mph NNW | 89% |
| Wednesday Night | 35°F | Chance Light Rain then Mostly Cloudy | 14 to 18 mph NNW | 51% |
| Thursday | 42°F | Partly Sunny | 9 to 15 mph NNW | 4% |
| Thursday Night | 30°F | Mostly Cloudy | 1 to 8 mph NE | 0% |
| Friday | 43°F | Mostly Sunny | 3 mph SSE | 0% |
| Friday Night | 30°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 53°F | Mostly Sunny | 5 to 9 mph SW | 4% |
| Saturday Night | 35°F | Partly Cloudy | 6 mph WNW | 10% |
| Sunday | 55°F | Mostly Sunny | 7 mph WSW | 3% |
| Sunday Night | 37°F | Partly Cloudy | 6 mph S | 0% |
| Monday | 57°F | Mostly Sunny | 6 to 14 mph W | 1% |
| Monday Night | 36°F | Mostly Clear | 5 to 8 mph WNW | 0% |
| Tuesday | 52°F | Mostly Sunny | 7 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Herman, MN
Last spring frost
May 1
First fall frost
Oct 9
Growing season
160 days
Hardiness zone
4b
Explore more for Herman, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Wheaton, Mn (17.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.