Fosston, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fosston, a city in Polk County, Minnesota.
Today
70°F
Sunny
Sunny, with a high near 70. West northwest wind around 13 mph.
7-day forecast for Fosston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Sunny | 13 mph WNW | 0% |
| Tonight | 48°F | Mostly Clear | 2 to 12 mph WSW | 0% |
| Wednesday | 77°F | Sunny | 5 to 12 mph SW | 0% |
| Wednesday Night | 57°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 | 58°F | Mostly Clear | 5 to 10 mph WSW | 5% |
| Friday | 80°F | Sunny | 6 to 12 mph WSW | 6% |
| Friday Night | 54°F | Mostly Clear | 3 to 12 mph NNE | 8% |
| Saturday | 77°F | Mostly Sunny | 3 to 9 mph ENE | 10% |
| Saturday Night | 55°F | Slight Chance Showers And Thunderstorms | 3 to 9 mph NNE | 20% |
| Sunday | 76°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% |
| Monday Night | 56°F | Slight Chance Rain Showers | 3 to 9 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Fosston (47.585, -95.753). Updated through the day.
Growing snapshot for Fosston
Last spring frost
May 15
First fall frost
Sep 26
Growing season
132 days
Hardiness zone
3b
More local growing data for Fosston: nearby ZIP 56542 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Beltrami
Climax
Crookston
Erskine
Fertile
Fisher
Gully
McIntosh
Mentor
Nielsville
Trail
Warren
Winger
Climate data from the nearest NOAA station, Fosston 1 E, Mn (0.3 mi from Fosston). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.