Castle Valley, UT

Climate overview — based on NOAA 1991-2020 normals from CASTLE VALLEY 1SE, UT US.

BSk Semi-arid (cold) climate 7a USDA hardiness Zone 7a

Year-round temperatures (°F)

10° 30° 50° 70° 90° J F M A M J J A S O N D
Avg high Avg low

Climate summary

Castle Valley has an annual average temperature of 54.7°F with about 12.3 inches of precipitation per year. The warmest month is July (average high 95.2°F), and the coldest is January (average low 17.9°F). October is typically the wettest month (1.48 in) and June the driest (0.59 in).

Annual swing
53.1°F
warmest to coldest month
Heating need
5,055
Cooling need
1,341

Best time to visit Castle Valley

Full guide →

Climate change signal

All-time records →

366 of 366 (100%) of Castle Valley's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

2010s
183
2020s
183

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month Avg High Avg Low Avg Temp Precipitation Snow Rainy days
January 38.8°F 17.9°F 28.4°F 0.95 in
February 46.2°F 25.1°F 35.7°F 1.06 in
March 58.1°F 33.4°F 45.8°F 1.11 in
April 65.9°F 40.5°F 53.2°F 0.81 in
May 76.6°F 49.9°F 63.3°F 0.88 in
June 89.3°F 60.5°F 74.9°F 0.59 in
July 95.2°F 67.7°F 81.5°F 0.97 in
August 92.3°F 64.8°F 78.6°F 1.06 in
September 83.4°F 56.0°F 69.7°F 1.31 in
October 68.0°F 41.7°F 54.9°F 1.48 in
November 52.3°F 29.7°F 41.0°F 1.11 in
December 39.0°F 19.4°F 29.2°F 1.01 in

Climate twins of Castle Valley

Why these? →

The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).

Frost dates
Last spring / first fall frost
All-time records
Hottest, coldest, wettest
Planting calendar
What to plant, and when

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