Winston, MT Weather & Growing Conditions
This Afternoon
47°F
Mostly Sunny
Mostly sunny. High near 47, with temperatures falling to around 42 in the afternoon. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 30°F | Partly Cloudy | 0 to 3 mph S | 0% |
| Wednesday | 46°F | Mostly Sunny | 2 mph NW | 0% |
| Wednesday Night | 29°F | Mostly Clear | 2 to 6 mph S | 0% |
| Thursday | 47°F | Mostly Sunny | 2 to 6 mph S | 7% |
| Thursday Night | 30°F | Partly Cloudy | 5 mph SW | 7% |
| Friday | 48°F | Mostly Sunny | 5 to 10 mph S | 8% |
| Friday Night | 32°F | Partly Cloudy | 5 to 13 mph SSW | 8% |
| Saturday | 50°F | Mostly Sunny | 3 to 8 mph SSE | 0% |
| Saturday Night | 34°F | Partly Cloudy | 5 to 17 mph SSE | 0% |
| Sunday | 56°F | Mostly Sunny | 7 to 15 mph SSE | 1% |
| Sunday Night | 35°F | Mostly Cloudy | 2 to 7 mph SSW | 2% |
| Monday | 52°F | Partly Sunny | 2 to 7 mph S | 3% |
| Monday Night | 36°F | Mostly Cloudy | 5 to 8 mph SSW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winston, MT
Last spring frost
May 19
First fall frost
Sep 19
Growing season
122 days
Hardiness zone
5a
Explore more for Winston, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Townsend 3Se, Mt (14.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.