Winnett, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winnett, a town in Petroleum County, Montana.
Today
54°F
Sunny
Sunny. High near 54, with temperatures falling to around 46 in the afternoon. South wind 7 to 10 mph, with gusts as high as 20 mph.
7-day forecast for Winnett
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Sunny | 7 to 10 mph S | 0% |
| Tonight | 30°F | Partly Cloudy | 2 to 7 mph WSW | 0% |
| Wednesday | 50°F | Mostly Sunny | 2 to 6 mph NNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 3 mph WSW | 0% |
| Thursday | 55°F | Mostly Sunny | 3 mph WSW | 0% |
| Thursday Night | 33°F | Partly Cloudy | 1 to 5 mph W | 1% |
| Friday | 58°F | Sunny | 5 to 9 mph WSW | 4% |
| Friday Night | 37°F | Partly Cloudy | 6 to 9 mph W | 4% |
| Saturday | 56°F | Sunny | 5 to 14 mph W | 1% |
| Saturday Night | 34°F | Mostly Clear | 7 mph SW | 0% |
| Sunday | 64°F | Mostly Sunny | 7 to 10 mph SW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 3 to 7 mph W | 1% |
| Monday | 57°F | Mostly Sunny | 2 to 6 mph W | 0% |
| Monday Night | 37°F | Mostly Cloudy | 6 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov) for Winnett (47.004, -108.347). Updated through the day.
Growing snapshot for Winnett
Last spring frost
May 18
First fall frost
Sep 21
Growing season
124 days
Hardiness zone
4b
More local growing data for Winnett: nearby ZIP 59087 weather · frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Valentine, Mt (18.7 mi from Winnett). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.