Colstrip, MT Weather & Growing Conditions
Overnight
32°F
Mostly Clear
Mostly clear, with a low around 32. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 32°F | Mostly Clear | 0 mph | 0% |
| Wednesday | 52°F | Mostly Sunny | 0 to 6 mph WNW | 0% |
| Wednesday Night | 32°F | Mostly Cloudy | 0 to 3 mph SW | 0% |
| Thursday | 54°F | Mostly Sunny | 2 mph NNW | 0% |
| Thursday Night | 37°F | Mostly Cloudy | 0 to 5 mph WNW | 1% |
| Friday | 53°F | Sunny | 2 to 10 mph WSW | 0% |
| Friday Night | 39°F | Partly Cloudy | 2 to 10 mph SW | 0% |
| Saturday | 57°F | Sunny | 1 to 10 mph W | 0% |
| Saturday Night | 37°F | Mostly Clear | 1 to 5 mph SSW | 0% |
| Sunday | 65°F | Mostly Sunny | 5 mph SW | 0% |
| Sunday Night | 41°F | Partly Cloudy | 5 mph WNW | 0% |
| Monday | 57°F | Mostly Sunny | 3 mph NW | 2% |
| Monday Night | 38°F | Partly Cloudy | 3 mph SSE | 2% |
| Tuesday | 60°F | Mostly Sunny | 2 to 7 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Colstrip, MT
Last spring frost
May 15
First fall frost
Sep 30
Growing season
138 days
Hardiness zone
5a
Explore more for Colstrip, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Colstrip, Mt (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.