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Fosston, MN Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Fosston, a city in Polk County, Minnesota.

Tonight
49°F
Scattered Rain Showers then Mostly Cloudy
Scattered rain showers between 7pm and 9pm. Mostly cloudy, with a low around 49. Northeast wind around 8 mph. Chance of precipitation is 40%.

7-day forecast for Fosston

WhenTempForecastWindPrecip
Tonight 49°F Scattered Rain Showers then Mostly Cloudy 8 mph NE 37%
Sunday 65°F Partly Sunny 9 mph ENE 0%
Sunday Night 44°F Mostly Cloudy 5 to 8 mph E 0%
Monday 64°F Mostly Sunny 6 mph ESE 0%
Monday Night 39°F Mostly Clear 6 mph SE 0%
Tuesday 65°F Sunny 6 to 9 mph SSE 0%
Tuesday Night 42°F Clear 9 mph SSE 0%
Wednesday 66°F Sunny 9 to 15 mph SSE 0%
Wednesday Night 48°F Partly Cloudy then Slight Chance Rain Showers 10 mph SSE 17%
Thursday 68°F Chance Rain Showers 13 mph SSE 45%
Thursday Night 51°F Chance Rain Showers then Mostly Cloudy 9 mph SSE 34%
Friday 72°F Partly Sunny 6 to 10 mph S 5%
Friday Night 55°F Partly Cloudy 12 mph SSE 11%
Saturday 71°F Chance Rain Showers 13 to 17 mph SSE 27%

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 20, 2026.