Polson, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Polson, a city in Lake County, Montana.
Overnight
44°F
Mostly Clear
Mostly clear, with a low around 44. East wind around 2 mph.
7-day forecast for Polson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Mostly Clear | 2 mph E | 0% |
| Tuesday | 80°F | Patchy Smoke then Sunny | 1 to 5 mph NNE | 0% |
| Tuesday Night | 49°F | Mostly Clear | 3 mph ENE | 0% |
| Wednesday | 87°F | Sunny | 3 mph WSW | 0% |
| Wednesday Night | 51°F | Mostly Clear | 1 to 5 mph SSE | 0% |
| Thursday | 94°F | Sunny | 1 to 5 mph S | 0% |
| Thursday Night | 54°F | Mostly Clear | 1 to 6 mph S | 0% |
| Friday | 96°F | Sunny | 0 to 8 mph WSW | 0% |
| Friday Night | 55°F | Clear | 5 to 15 mph SSW | 0% |
| Saturday | 93°F | Sunny | 3 to 10 mph SSW | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 to 12 mph SSW | 0% |
| Sunday | 90°F | Sunny | 1 to 5 mph SW | 0% |
| Sunday Night | 52°F | Mostly Clear | 1 to 6 mph NNW | 0% |
| Monday | 87°F | Sunny | 0 to 5 mph N | 0% |
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 Aug 4, 2026.