Trego, MT Weather & Growing Conditions
This Afternoon
73°F
Mostly Sunny
Mostly sunny, with a high near 73. East wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 1 mph E | 0% |
| Tonight | 47°F | Partly Cloudy | 1 mph SSW | 2% |
| Sunday | 74°F | Sunny | 2 mph SSW | 0% |
| Sunday Night | 47°F | Mostly Clear | 2 mph SSW | 0% |
| Monday | 75°F | Sunny | 3 mph S | 0% |
| Monday Night | 49°F | Mostly Clear | 2 mph SSW | 0% |
| Tuesday | 73°F | Mostly Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 2 mph S | 0% |
| Wednesday | 69°F | Mostly Sunny | 2 to 6 mph SSW | 2% |
| Wednesday Night | 47°F | Partly Cloudy | 3 mph SSW | 2% |
| Thursday | 65°F | Partly Sunny | 3 mph S | 3% |
| Thursday Night | 47°F | Mostly Cloudy | 1 mph S | 10% |
| Friday | 63°F | Slight Chance Light Rain | 3 mph SSE | 18% |
| Friday Night | 44°F | Slight Chance Light Rain | 2 mph SW | 23% |
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 Sep 19, 2026.