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Weather in Westby, MT · National Weather Service + NOAA

Westby has real winters

Westby has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 81°, a January night drops to 0°, and about 37 inches of snow falls in a normal winter. Normal November highs come to 36°, and lows to 16°.

Winter 22°/3°Spring 52°/28°Summer 79°/52°Fall 53°/29°
Right now
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Sunrise 8:45 am · sunset 6:34 pm

Getting the latest forecast from the National Weather Service…

What stands out about Westby’s weather

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

Climate →
Real wintersJanuary nights average 0°, colder than 96% of U.S. towns.A dry climateJust 15 inches of rain and melted snow a year, less than 94% of U.S. towns.A long heating seasonMore heating degree days than 98% of U.S. towns.
A normal year

Where today sits in Westby’s year

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

Full climate →
Winter
22° / 3°
12 days with an inch or more of snow
Spring
52° / 28°
Last frost around May 18
Summer
79° / 52°
10 days reach 90° in a normal year
Fall now
53° / 29°
First frost around Sep 21
Pastthe usual first frost (Sep 21). Last frost next spring: May 18
Best months to be outside
JunJulAugSep
Highs of 62–84° and lows of 40° or more
How much snow does Westby get?About 37 inches a winter.When is it wettest?June, with 3.3 inches.Is it warmer than it used to be?+1.6° vs. the 20th century.

Weather talk

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

Town Square →
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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 Westby itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Fortuna 1 W, ND (12 mi, snow) and Westby, MT (1 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.