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Weather in Colstrip, MT · National Weather Service + NOAA

Colstrip has a dry climate

Colstrip has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 87°, a January night drops to 12°, and about 37 inches of snow falls in a normal winter. In November, a normal day reaches 45° and a normal night drops to 22°.

Winter 36°/13°Spring 57°/31°Summer 83°/53°Fall 60°/32°
Right now
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Sunrise 8:48 am · sunset 6:51 pm

Getting the latest forecast from the National Weather Service…

What stands out about Colstrip’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
A dry climateJust 16 inches of rain and melted snow a year, less than 93% of U.S. towns.A long growing season138 frost-free days, from May 15 to Sep 30.Warmer summers than most of MontanaJuly afternoons average 87°, warmer than 444 of 497 Montana towns.
A normal year

Where today sits in Colstrip’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
36° / 13°
18 days with an inch or more of snow
Spring
57° / 31°
Last frost around May 15
Summer
83° / 53°
24 days reach 90° in a normal year
Fall now
60° / 32°
First frost around Sep 30
Pastthe usual first frost (Sep 30). Last frost next spring: May 15
Best months to be outside
MayJunSep
Highs of 62–84° and lows of 40° or more
How much snow does Colstrip get?About 37 inches a winter.When is it wettest?May, with 3.1 inches.Is it warmer than it used to be?+1.3° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Colstrip.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Colstrip itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Colstrip, MT (1 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.