Colstrip, MT Weather & Growing Conditions
Overnight
57°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3am, then patchy fog and showers and thunderstorms. Cloudy. Low around 57, with temperatures rising to around 59 overnight. Northwest wind around 5 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Chance Showers And Thunderstorms | 5 mph NW | 78% |
| Saturday | 62°F | Patchy Fog | 8 mph NNE | 99% |
| Saturday Night | 53°F | Patchy Fog | 7 to 10 mph ENE | 90% |
| Sunday | 61°F | Rain Showers | 7 mph ENE | 84% |
| 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 | 77°F | Sunny | 3 mph S | 0% |
| Tuesday Night | 55°F | Mostly Clear then Slight Chance Rain Showers | 3 mph SE | 15% |
| Wednesday | 79°F | Mostly Sunny | 2 mph SSE | 8% |
| Wednesday Night | 55°F | Partly Cloudy | 3 mph SSE | 5% |
| Thursday | 82°F | Sunny | 3 mph SSW | 1% |
| Thursday Night | 56°F | Mostly Clear | 6 mph SE | 0% |
| Friday | 81°F | Sunny | 5 mph SSE | 1% |
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 Sep 19, 2026.