Winston, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winston, a community in Broadwater County, Montana.
Today
75°F
Patchy Smoke
Patchy smoke before 3pm. Sunny, with a high near 75. East wind 1 to 5 mph.
7-day forecast for Winston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Patchy Smoke | 1 to 5 mph E | 0% |
| Tonight | 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% |
| Monday Night | 56°F | Partly Cloudy | 6 to 9 mph NNW | 4% |
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 Aug 4, 2026.