Colstrip, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colstrip, a city in Rosebud County, Montana.
Today
76°F
Sunny
Sunny, with a high near 76. Northwest wind 2 to 7 mph.
7-day forecast for Colstrip
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 2 to 7 mph NW | 0% |
| Tonight | 53°F | Mostly Clear | 2 to 7 mph ESE | 1% |
| Wednesday | 86°F | Sunny | 5 mph WSW | 0% |
| Wednesday Night | 57°F | Mostly Clear | 3 mph SSW | 0% |
| Thursday | 94°F | Sunny | 5 mph W | 0% |
| Thursday Night | 62°F | Mostly Clear | 5 mph NE | 0% |
| Friday | 98°F | Sunny | 5 mph SW | 0% |
| Friday Night | 65°F | Mostly Clear | 6 mph NNE | 0% |
| Saturday | 95°F | Sunny | 3 to 8 mph NW | 0% |
| Saturday Night | 66°F | Partly Cloudy | 6 mph ENE | 1% |
| Sunday | 94°F | Mostly Sunny | 3 to 7 mph NNE | 0% |
| Sunday Night | 65°F | Partly Cloudy | 3 to 7 mph NE | 8% |
| Monday | 91°F | Mostly Sunny | 3 to 8 mph ENE | 3% |
| Monday Night | 65°F | Partly Cloudy then Slight Chance Rain Showers | 8 mph ENE | 19% |
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 Aug 4, 2026.