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Weather in Boulder, UT · National Weather Service + NOAA

Boulder stays cool in summer

Boulder has chilly, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 20°, and about 52 inches of snow falls in a normal winter. In November, a normal day reaches 49° and a normal night drops to 27°.

Winter 40°/20°Spring 59°/34°Summer 81°/55°Fall 61°/38°
Right now
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Sunrise 8:52 am · sunset 7:25 pm

Getting the latest forecast from the National Weather Service…

What stands out about Boulder’s weather

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

Climate →
Cool summersJuly afternoons average 84°, cooler than 298 of 334 Utah towns.Warming faster than mostThe last 30 years averaged 1.9° warmer than the 1900s, a bigger shift than 90% of U.S. towns.A dry climateJust 14 inches of rain and melted snow a year, less than 95% of U.S. towns.
A normal year

Where today sits in Boulder’s year

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

Full climate →
Winter
40° / 20°
15 days with an inch or more of snow
Spring
59° / 34°
Last frost around May 4
Summer
81° / 55°
8 days reach 90° in a normal year
Fall now
61° / 38°
First frost around Oct 14
Pastthe usual first frost (Oct 14). Last frost next spring: May 4
Best months to be outside
MayJunJulAugSep
Highs of 62–84° and lows of 40° or more
How much snow does Boulder get?About 52 inches a winter.When is it wettest?August, with 1.8 inches.Is it warmer than it used to be?+1.9° vs. the 20th century.

Weather talk

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

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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 Boulder itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Boulder, UT (1 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.