Winnett, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winnett, a town in Petroleum County, Montana.
Overnight
37°F
Mostly Clear
Mostly clear, with a low around 37. West southwest wind around 5 mph.
7-day forecast for Winnett
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 37°F | Mostly Clear | 5 mph WSW | 0% |
| Tuesday | 77°F | Sunny | 6 mph NW | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 6 mph SSW | 1% |
| Wednesday | 87°F | Mostly Sunny | 3 to 8 mph W | 0% |
| Wednesday Night | 54°F | Mostly Clear | 3 to 9 mph WNW | 0% |
| Thursday | 94°F | Sunny | 3 to 12 mph W | 0% |
| Thursday Night | 57°F | Mostly Clear | 3 to 14 mph W | 0% |
| Friday | 97°F | Sunny | 3 to 9 mph ESE | 0% |
| Friday Night | 61°F | Mostly Clear | 5 to 13 mph N | 0% |
| Saturday | 95°F | Sunny | 8 to 16 mph NW | 0% |
| Saturday Night | 60°F | Mostly Clear | 3 to 12 mph NNE | 1% |
| Sunday | 92°F | Mostly Sunny | 3 to 13 mph N | 1% |
| Sunday Night | 60°F | Partly Cloudy | 5 to 13 mph NNE | 7% |
| Monday | 89°F | Mostly Sunny | 6 to 12 mph NNE | 7% |
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 Aug 4, 2026.