Trego, MT Weather & Growing Conditions
This Afternoon
43°F
Mostly Cloudy
Mostly cloudy. High near 43, with temperatures falling to around 38 in the afternoon. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 43°F | Mostly Cloudy | 0 mph | 0% |
| Tonight | 29°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 45°F | Mostly Sunny | 1 mph E | 0% |
| Wednesday Night | 29°F | Mostly Clear | 0 to 3 mph S | 3% |
| Thursday | 41°F | Partly Sunny | 5 mph SSW | 10% |
| Thursday Night | 32°F | Mostly Cloudy | 3 mph SSW | 8% |
| Friday | 43°F | Mostly Cloudy then Slight Chance Light Rain | 6 mph SSW | 21% |
| Friday Night | 33°F | Slight Chance Light Rain then Slight Chance Rain And Snow | 2 to 6 mph SSW | 21% |
| Saturday | 48°F | Partly Sunny | 3 mph S | 7% |
| Saturday Night | 35°F | Mostly Cloudy then Chance Light Rain | 1 to 6 mph SSE | 49% |
| Sunday | 48°F | Chance Light Rain | 5 to 12 mph SSW | 49% |
| Sunday Night | 34°F | Chance Light Rain then Chance Rain And Snow | 5 mph SSW | 25% |
| Monday | 46°F | Partly Sunny then Slight Chance Light Rain | 2 mph S | 20% |
| Monday Night | 35°F | Slight Chance Rain And Snow | 2 mph S | 21% |
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 (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.