Colstrip, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colstrip, a city in Rosebud County, Montana.
Today
63°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 63, with temperatures falling to around 60 in the afternoon. Northeast wind around 12 mph. Chance of precipitation is 100%.
7-day forecast for Colstrip
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Showers And Thunderstorms | 12 mph NE | 97% |
| Tonight | 53°F | Patchy Fog | 6 to 10 mph ENE | 89% |
| Sunday | 62°F | Rain Showers | 7 mph ENE | 81% |
| Sunday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 5 mph ESE | 29% |
| Monday | 70°F | Partly Sunny | 5 mph SE | 3% |
| Monday Night | 50°F | Mostly Clear | 6 mph SE | 0% |
| Tuesday | 78°F | Sunny | 3 mph SSE | 0% |
| Tuesday Night | 54°F | Mostly Clear then Slight Chance Rain Showers | 2 mph SE | 15% |
| Wednesday | 79°F | Mostly Sunny | 2 mph SSE | 8% |
| Wednesday Night | 54°F | Partly Cloudy | 2 mph SSE | 5% |
| Thursday | 82°F | Sunny | 3 mph SSE | 0% |
| Thursday Night | 56°F | Mostly Clear | 5 mph SE | 0% |
| Friday | 82°F | Sunny | 5 mph SSE | 1% |
| Friday Night | 54°F | Partly Cloudy | 6 mph SSE | 5% |
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 Sep 19, 2026.