Colstrip, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colstrip, a city in Rosebud County, Montana.
This Afternoon
52°F
Partly Sunny
Partly sunny. High near 52, with temperatures falling to around 46 in the afternoon. North northwest wind around 6 mph.
7-day forecast for Colstrip
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Partly Sunny | 6 mph NNW | 0% |
| Tonight | 32°F | Patchy Fog | 3 to 8 mph W | 0% |
| Thursday | 55°F | Mostly Sunny | 2 to 8 mph W | 0% |
| Thursday Night | 35°F | Mostly Cloudy | 2 to 6 mph WNW | 3% |
| Friday | 54°F | Sunny | 5 mph WSW | 0% |
| Friday Night | 38°F | Mostly Clear | 2 to 10 mph SW | 0% |
| Saturday | 59°F | Sunny | 1 to 10 mph W | 0% |
| Saturday Night | 37°F | Mostly Clear | 1 to 5 mph SW | 0% |
| Sunday | 65°F | Mostly Sunny | 1 to 5 mph SW | 0% |
| Sunday Night | 41°F | Partly Cloudy | 1 to 5 mph WNW | 0% |
| Monday | 58°F | Mostly Sunny | 5 mph NNW | 0% |
| Monday Night | 38°F | Mostly Cloudy | 2 mph SE | 1% |
| Tuesday | 61°F | Mostly Sunny | 1 to 5 mph WSW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 3 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Colstrip (45.895, -106.628). Updated through the day.
Growing snapshot for Colstrip
Last spring frost
May 15
First fall frost
Sep 30
Growing season
138 days
Hardiness zone
5a
More local growing data for Colstrip: nearby ZIP 59323 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Colstrip, Mt (4.5 mi from Colstrip). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.