Fosston, MN Weather & Growing Conditions
Overnight
48°F
Mostly Clear
Mostly clear. Low around 48, with temperatures rising to around 52 overnight. West northwest wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Clear | 8 mph WNW | 0% |
| Tuesday | 70°F | Sunny | 8 to 13 mph W | 0% |
| Tuesday Night | 49°F | Mostly Clear | 2 to 12 mph SW | 0% |
| Wednesday | 77°F | Sunny | 5 to 12 mph SW | 0% |
| Wednesday Night | 58°F | Partly Cloudy then Slight Chance Rain Showers | 10 mph SW | 15% |
| Thursday | 81°F | Slight Chance Rain Showers then Sunny | 13 mph SW | 15% |
| Thursday Night | 59°F | Mostly Clear | 5 to 10 mph WSW | 5% |
| Friday | 80°F | Sunny | 6 to 12 mph W | 6% |
| Friday Night | 54°F | Mostly Clear | 2 to 12 mph NNE | 8% |
| Saturday | 78°F | Mostly Sunny | 2 to 9 mph E | 10% |
| Saturday Night | 55°F | Slight Chance Showers And Thunderstorms | 3 to 9 mph NNE | 20% |
| Sunday | 77°F | Slight Chance Rain Showers then Mostly Sunny | 3 to 9 mph N | 17% |
| Sunday Night | 56°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 9 mph NNE | 19% |
| Monday | 76°F | Slight Chance Rain Showers | 5 to 9 mph NNE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fosston, MN
Last spring frost
May 15
First fall frost
Sep 26
Growing season
132 days
Hardiness zone
3b
Explore more for Fosston, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Fosston 1 E, Mn (0.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.