Fosston, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fosston, a city in Polk County, Minnesota.
Today
69°F
Mostly Cloudy
Mostly cloudy, with a high near 69. Northeast wind 3 to 8 mph.
7-day forecast for Fosston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Mostly Cloudy | 3 to 8 mph NE | 5% |
| Tonight | 48°F | Mostly Cloudy | 9 mph NNE | 6% |
| Sunday | 63°F | Partly Sunny | 9 mph ENE | 0% |
| Sunday Night | 41°F | Mostly Cloudy | 7 mph E | 0% |
| Monday | 65°F | Sunny | 7 mph SE | 0% |
| Monday Night | 38°F | Mostly Clear | 7 mph SE | 1% |
| Tuesday | 66°F | Sunny | 7 to 10 mph SSE | 1% |
| Tuesday Night | 42°F | Mostly Clear | 9 mph SSE | 0% |
| Wednesday | 67°F | Mostly Sunny | 9 to 14 mph SSE | 0% |
| Wednesday Night | 47°F | Partly Cloudy | 10 mph SSE | 12% |
| Thursday | 69°F | Partly Sunny | 8 to 12 mph SSE | 12% |
| Thursday Night | 50°F | Partly Cloudy | 8 mph SSE | 10% |
| Friday | 71°F | Mostly Sunny | 8 to 13 mph S | 6% |
| Friday Night | 53°F | Partly Cloudy | 12 mph SSE | 13% |
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
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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 Sep 19, 2026.