Polson, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Polson, a city in Lake County, Montana.
This Afternoon
73°F
Mostly Sunny
Mostly sunny, with a high near 73. West northwest wind around 7 mph.
7-day forecast for Polson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 7 mph WNW | 2% |
| Tonight | 49°F | Mostly Cloudy | 2 mph NNE | 10% |
| Saturday | 73°F | Areas Of Fog then Mostly Sunny | 2 mph NNE | 7% |
| Saturday Night | 47°F | Partly Cloudy | 3 mph ESE | 0% |
| Sunday | 74°F | Patchy Fog then Sunny | 2 mph SSW | 0% |
| Sunday Night | 48°F | Clear | 2 mph SE | 0% |
| Monday | 76°F | Sunny | 0 to 3 mph S | 0% |
| Monday Night | 49°F | Mostly Clear | 2 mph SE | 0% |
| Tuesday | 75°F | Sunny | 2 mph WSW | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 2 mph ESE | 1% |
| Wednesday | 73°F | Sunny | 0 to 5 mph SSW | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph S | 4% |
| Thursday | 75°F | Mostly Sunny | 2 mph WNW | 2% |
| Thursday Night | 48°F | Partly Cloudy | 2 mph ENE | 1% |
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 Sep 19, 2026.