Castle Dale, UT climate
Castle Dale has cold winters and warm summers, with very little rain. A typical July afternoon reaches 90°, a January night drops to 13°, and about 11 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Castle Dale feels like
Winter
Spring
Summer
Fall
Castle Dale weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 38° | 13° | 0.6" | 5.0" | 3 | 13 | 17° – 34° |
| February | 45° | 19° | 0.7" | 2.1" | 4 | 5 | 24° – 40° |
| March | 55° | 27° | 0.6" | 0.2" | 3 | 1 | 36° – 46° |
| April | 62° | 32° | 0.5" | 0.1" | 4 | 0 | 43° – 54° |
| May | 73° | 41° | 0.7" | 0 | 4 | 0 | 51° – 61° |
| June | 84° | 49° | 0.5" | 0 | 4 | 0 | 61° – 72° |
| July | 90° | 57° | 0.7" | 0 | 3 | 0 | 69° – 77° |
| August | 87° | 54° | 1.0" | 0 | 6 | 0 | 68° – 75° |
| September | 79° | 45° | 1.1" | 0 | 5 | 0 | 58° – 66° |
| October | 66° | 34° | 1.1" | 0.1" | 5 | 0 | 44° – 55° |
| November | 51° | 23° | 0.4" | 1.1" | 3 | 1 | 31° – 42° |
| December | 38° | 14° | 0.5" | 2.4" | 2 | 4 | 18° – 32° |
| Year | 64° | 34° | 8.4" | 11.0" | 47 | 23 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Castle Dale
Castle Dale gets 8 inches of rain and melted snow a year. September is the wettest month and November the driest. Rain or snow falls on about 47 days a year. Snow covers the ground about 23 days of the year.
About 128 frost-free days a year
In half of years the last 32° night comes by May 18 and the first one by September 27. That leaves about 128 frost-free days for gardens, shorter than 95% of U.S. towns.
Heating and cooling a home in Castle Dale
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Castle Dale, 92% of that work is heating and 8% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Castle Dale compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Castle Dale averaged 1.7° warmer than the 1900s. The biggest change is in January (+3.3°). The shift is larger than in 81% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Castle Dale’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 17° to 34°. August is the most reliable, staying within 7°.
Common questions about Castle Dale’s climate
What is the coldest month in Castle Dale?
January, with a typical high of 38° and a low of 13°.
What is the hottest month in Castle Dale?
July, with a typical high of 90° and a low of 57°. About 44 days a year reach 90°.
How much snow does Castle Dale get?
About 11 inches in a normal winter, most of it in January.
When is the first frost in Castle Dale?
In half of years the first 32° night comes by September 27, and the last spring frost by May 18.
What is the rainiest month in Castle Dale?
September, with 1.1 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Castle Dale itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Castledale Hunter Up&l, UT (3 mi, snow) and Castle Dale, UT (1 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.