Winston, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winston, a community in Broadwater County, Montana.
This Afternoon
72°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 72. North northwest wind 6 to 9 mph. Chance of precipitation is 50%.
7-day forecast for Winston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Showers And Thunderstorms | 6 to 9 mph NNW | 45% |
| Tonight | 52°F | Showers And Thunderstorms | 7 to 12 mph WNW | 98% |
| Saturday | 59°F | Showers And Thunderstorms | 8 to 12 mph WNW | 97% |
| Saturday Night | 48°F | Chance Light Rain | 1 to 7 mph WNW | 38% |
| Sunday | 69°F | Patchy Fog then Mostly Sunny | 1 to 6 mph SSE | 3% |
| Sunday Night | 49°F | Mostly Clear | 3 to 7 mph SSE | 0% |
| Monday | 74°F | Sunny | 3 to 8 mph SSE | 0% |
| Monday Night | 50°F | Mostly Clear | 1 to 5 mph SSW | 0% |
| Tuesday | 75°F | Sunny | 0 to 5 mph SSE | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 3 mph SW | 2% |
| Wednesday | 75°F | Sunny | 2 to 8 mph SSE | 1% |
| Wednesday Night | 50°F | Mostly Clear | 5 mph SSE | 3% |
| Thursday | 77°F | Sunny | 5 to 9 mph SSE | 2% |
| Thursday Night | 51°F | Mostly Clear | 9 mph SSE | 3% |
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 Sep 18, 2026.