Morongo Valley, CA climate
Morongo Valley has mild winters and hot summers, with very little rain. A typical July afternoon reaches 99°, a January night drops to 40°, and about 2 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Morongo Valley feels like
Winter
Spring
Summer
Fall
Morongo Valley 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 62° | 40° | 2.0" | 0 | 4 | 47° – 57° |
| February | 64° | 41° | 1.4" | 0.7" | 3 | 45° – 60° |
| March | 69° | 44° | 1.3" | 0 | 3 | 49° – 63° |
| April | 75° | 48° | 0.3" | 0 | 2 | 56° – 66° |
| May | 83° | 54° | 0.1" | 0 | 1 | 61° – 75° |
| June | 93° | 62° | 0.0" | 0 | 0 | 71° – 82° |
| July | 99° | 68° | 0.2" | 0 | 3 | 79° – 87° |
| August | 98° | 68° | 0.2" | 0 | 2 | 81° – 87° |
| September | 92° | 64° | 0.2" | 0 | 2 | 74° – 82° |
| October | 81° | 54° | 0.5" | 0 | 1 | 64° – 74° |
| November | 70° | 45° | 0.4" | 0.1" | 2 | 49° – 63° |
| December | 61° | 39° | 1.3" | 0.9" | 4 | 45° – 55° |
| Year | 79° | 52° | 7.9" | 1.7" | 26 |
“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 Morongo Valley
Morongo Valley gets 8 inches of rain and melted snow a year. January is the wettest month and June the driest. Rain or snow falls on about 26 days a year.
About 297 frost-free days a year
In half of years the last 32° night comes by February 25 and the first one by December 15. That leaves about 297 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Morongo Valley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Morongo Valley, 52% of that work is heating and 48% is cooling.
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 Morongo Valley 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 Morongo Valley averaged 2.0° warmer than the 1900s. The biggest change is in January (+2.7°). The shift is larger than in 93% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Morongo Valley’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 45° to 60°. August is the most reliable, staying within 7°.
Common questions about Morongo Valley’s climate
What is the coldest month in Morongo Valley?
December, with a typical high of 61° and a low of 39°.
What is the hottest month in Morongo Valley?
July, with a typical high of 99° and a low of 68°. About 91 days a year reach 90°.
How much snow does Morongo Valley get?
About 2 inches in a normal winter, most of it in December.
When is the first frost in Morongo Valley?
In half of years the first 32° night comes by December 15, and the last spring frost by February 25.
What is the rainiest month in Morongo Valley?
January, with 2.0 inches of rain and melted snow. The year totals 8 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Morongo Valley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Yucca Valley, CA (11 mi, snow) and Morongo Valley N, CA (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.