Winston, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winston, a community in Broadwater County, Montana.
Overnight
30°F
Partly Cloudy
Partly cloudy, with a low around 30. West northwest wind around 1 mph.
7-day forecast for Winston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 30°F | Partly Cloudy | 1 mph WNW | 0% |
| Wednesday | 47°F | Mostly Sunny | 2 mph NNW | 0% |
| Wednesday Night | 30°F | Mostly Clear | 2 to 7 mph SSW | 0% |
| Thursday | 46°F | Partly Sunny | 3 mph SSE | 6% |
| Thursday Night | 29°F | Partly Cloudy | 5 mph WSW | 6% |
| Friday | 48°F | Mostly Sunny | 3 to 10 mph S | 0% |
| Friday Night | 34°F | Partly Cloudy | 7 to 10 mph S | 0% |
| Saturday | 53°F | Mostly Sunny | 5 to 9 mph SSE | 0% |
| Saturday Night | 36°F | Partly Cloudy | 7 to 21 mph SSE | 0% |
| Sunday | 58°F | Mostly Sunny | 7 to 17 mph S | 3% |
| Sunday Night | 35°F | Mostly Cloudy | 1 to 8 mph W | 3% |
| Monday | 52°F | Mostly Sunny | 1 to 6 mph S | 2% |
| Monday Night | 35°F | Mostly Cloudy | 5 mph SSE | 2% |
| Tuesday | 55°F | Mostly Sunny | 3 to 8 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Winston (46.468, -111.665). Updated through the day.
Growing snapshot for Winston
Last spring frost
May 19
First fall frost
Sep 19
Growing season
122 days
Hardiness zone
5a
More local growing data for Winston: nearby ZIP 59647 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Townsend 3Se, Mt (14.8 mi from Winston). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.