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Polson, MT Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Polson, a city in Lake County, Montana.

This Afternoon
44°F
Partly Sunny
Partly sunny, with a high near 44. Northeast wind around 1 mph.

7-day forecast for Polson

WhenTempForecastWindPrecip
This Afternoon 44°F Partly Sunny 1 mph NE 0%
Tonight 26°F Patchy Fog 0 mph 0%
Wednesday 46°F Patchy Fog then Partly Sunny 1 mph WNW 0%
Wednesday Night 26°F Partly Cloudy 2 mph SSE 1%
Thursday 47°F Partly Sunny then Slight Chance Light Rain 2 to 6 mph S 18%
Thursday Night 30°F Slight Chance Light Rain then Mostly Cloudy 6 mph S 18%
Friday 49°F Partly Sunny then Slight Chance Light Rain 5 to 8 mph SSW 21%
Friday Night 33°F Slight Chance Light Rain 5 to 10 mph S 21%
Saturday 52°F Partly Sunny 1 to 5 mph S 3%
Saturday Night 33°F Mostly Cloudy 2 mph SE 11%
Sunday 57°F Slight Chance Light Rain 2 to 8 mph SSW 20%
Sunday Night 34°F Slight Chance Light Rain then Mostly Cloudy 1 to 7 mph SSW 20%
Monday 53°F Mostly Cloudy then Slight Chance Light Rain 1 mph SW 15%
Monday Night 34°F Slight Chance Light Rain 0 to 3 mph S 18%

Forecast source: National Weather Service (api.weather.gov) for Polson (47.688, -114.141). Updated through the day.

Growing snapshot for Polson

Last spring frost
May 10
First fall frost
Oct 5
Growing season
147 days
Hardiness zone
6a

More local growing data for Polson: nearby ZIP 59860 weather · frost dates · planting calendar · Montana frost dates

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Climate data from the nearest NOAA station, Polson, Mt (2.8 mi from Polson). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.