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Weather in Castle Valley, UT · National Weather Service + NOAA

Castle Valley has hot summers

Castle Valley has chilly winters and hot summers, with very little rain. A typical July afternoon reaches 96°, a January night drops to 21°, and about 15 inches of snow falls in a normal winter. Normal November highs come to 54°, and lows to 30°.

Winter 44°/23°Spring 69°/41°Summer 93°/62°Fall 69°/41°
Right now
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Sunrise 8:45 am · sunset 7:16 pm

Getting the latest forecast from the National Weather Service…

What stands out about Castle Valley’s weather

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

Climate →
Hot summersJuly afternoons average 96°, hotter than 97% of U.S. towns.Warming faster than mostThe last 30 years averaged 2.4° warmer than the 1900s, a bigger shift than 99% of U.S. towns.A dry climateJust 10 inches of rain and melted snow a year, less than 98% of U.S. towns.A long growing season185 frost-free days, from Apr 17 to Oct 23.
A normal year

Where today sits in Castle Valley’s year

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

Full climate →
Winter
44° / 23°
5 days with an inch or more of snow
Spring
69° / 41°
Last frost around Apr 17
Summer
93° / 62°
73 days reach 90° in a normal year
Fall now
69° / 41°
First frost around Oct 23
Pastthe usual first frost (Oct 23). Last frost next spring: Apr 17
Best months to be outside
MaySepOct
Highs of 62–84° and lows of 40° or more
How much snow does Castle Valley get?About 15 inches a winter.When is it wettest?October, with 1.2 inches.Is it warmer than it used to be?+2.4° vs. the 20th century.

Weather talk

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

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