Trego, MT Weather & Growing Conditions
Tonight
46°F
Partly Cloudy
Partly cloudy, with a low around 46. North northeast wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Partly Cloudy | 6 mph NNE | 5% |
| Saturday | 63°F | Sunny | 5 mph SSW | 2% |
| Saturday Night | 47°F | Partly Cloudy | 3 mph SE | 1% |
| Sunday | 64°F | Sunny | 5 mph S | 0% |
| Sunday Night | 48°F | Mostly Clear | 5 mph SSE | 0% |
| Monday | 64°F | Sunny | 3 to 7 mph S | 0% |
| Monday Night | 47°F | Partly Cloudy | 5 mph SSW | 0% |
| Tuesday | 62°F | Sunny | 2 to 6 mph S | 0% |
| Tuesday Night | 46°F | Partly Cloudy | 5 mph S | 1% |
| Wednesday | 58°F | Sunny | 3 to 8 mph S | 1% |
| Wednesday Night | 46°F | Partly Cloudy | 6 mph SSE | 1% |
| Thursday | 61°F | Mostly Sunny | 6 mph SE | 2% |
| Thursday Night | 49°F | Partly Cloudy | 6 mph ESE | 3% |
| Friday | 59°F | Partly Sunny | 6 mph SSE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Trego, MT
Last spring frost
May 16
First fall frost
Sep 18
Growing season
121 days
Hardiness zone
5a
Explore more for Trego, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Fortine 1 N, Mt (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.