Winston, MT Weather & Growing Conditions
Overnight
43°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 43. Southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Patchy Smoke | 2 mph SW | 0% |
| Tuesday | 75°F | Patchy Smoke | 1 to 5 mph ESE | 0% |
| Tuesday Night | 49°F | Mostly Clear | 1 to 5 mph W | 0% |
| Wednesday | 82°F | Sunny | 1 to 6 mph E | 0% |
| Wednesday Night | 52°F | Mostly Clear | 3 to 7 mph WNW | 0% |
| Thursday | 90°F | Sunny | 1 to 8 mph WNW | 0% |
| Thursday Night | 56°F | Mostly Clear | 2 to 9 mph W | 0% |
| Friday | 94°F | Sunny | 2 to 17 mph SSE | 0% |
| Friday Night | 57°F | Mostly Clear | 5 to 14 mph WNW | 0% |
| Saturday | 91°F | Sunny | 2 to 9 mph S | 0% |
| Saturday Night | 57°F | Mostly Clear | 5 to 9 mph NW | 0% |
| Sunday | 88°F | Sunny | 2 to 7 mph NW | 1% |
| Sunday Night | 56°F | Mostly Clear | 5 to 10 mph NNW | 1% |
| Monday | 86°F | Sunny | 2 to 7 mph NNW | 1% |
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 Aug 4, 2026.