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Weather in Casper, WY · National Weather Service + NOAA

Casper is snow country

Casper has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 89°, a January night drops to 15°, and about 82 inches of snow falls in a normal winter. A typical November afternoon reaches 46°, and nights fall to 22°.

Winter 38°/15°Spring 58°/31°Summer 85°/51°Fall 61°/32°
Right now
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Sunrise 8:41 am · sunset 6:56 pm

Getting the latest forecast from the National Weather Service…

What stands out about Casper’s weather

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

Climate →
Snow countryAbout 82 inches a winter, more than 95% of U.S. towns.A dry climateJust 12 inches of rain and melted snow a year, less than 97% of U.S. towns.The snowiest town aroundMore snow than any of the 4 towns around it with snow records.
A normal year

Where today sits in Casper’s year

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

Full climate →
Winter
38° / 15°
24 days with an inch or more of snow
Spring
58° / 31°
Last frost around May 10
Summer
85° / 51°
36 days reach 90° in a normal year
Fall now
61° / 32°
First frost around Sep 29
Pastthe usual first frost (Sep 29). Last frost next spring: May 10
Best months to be outside
JunSep
Highs of 62–84° and lows of 40° or more
How much snow does Casper get?About 82 inches a winter.When is it wettest?May, with 2.3 inches.Is it warmer than it used to be?+1.7° vs. the 20th century.

Weather talk

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

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 Casper itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Casper 4.3 Wsw, WY (5 mi, snow) and Casper WWTP, WY (2 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.