Oak Glen, CA climate
Oak Glen has mild, snowy winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 36°, and about 31 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Oak Glen feels like
Winter
Spring
Summer
Fall
Oak Glen 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 | 55° | 36° | 5.6" | 6.3" | 7 | 40° – 52° |
| February | 55° | 36° | 6.1" | 9.8" | 8 | 37° – 53° |
| March | 60° | 38° | 4.9" | 4.1" | 6 | 41° – 56° |
| April | 65° | 41° | 2.1" | 3.5" | 4 | 47° – 57° |
| May | 72° | 46° | 0.9" | 0.5" | 2 | 52° – 65° |
| June | 82° | 54° | 0.2" | 0 | 0 | 62° – 72° |
| July | 87° | 61° | 0.3" | 0 | 2 | 69° – 78° |
| August | 88° | 61° | 0.2" | 0 | 2 | 72° – 77° |
| September | 82° | 57° | 0.5" | 0 | 2 | 66° – 73° |
| October | 72° | 48° | 1.0" | 0 | 3 | 56° – 66° |
| November | 62° | 40° | 1.9" | 2.3" | 4 | 43° – 56° |
| December | 54° | 35° | 4.5" | 4.2" | 6 | 40° – 51° |
| Year | 69° | 46° | 28.1" | 30.7" | 47 |
“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 Oak Glen
Oak Glen gets 28 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 47 days a year.
About 160 frost-free days a year
In half of years the last 32° night comes by May 16 and the first one by October 24. That leaves about 160 frost-free days for gardens, shorter than 71% of U.S. towns.
Heating and cooling a home in Oak Glen
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Oak Glen, 89% of that work is heating and 11% 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.
Oak Glen and its neighbors
Oak Glen borders 1 town with climate data. January nights across them vary by 5.2°. Yucaipa has both the coldest January nights (41°) and the hottest July afternoons (96°). Oak Glen’s January low is 36° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Oak Glen 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 Oak Glen averaged 1.8° warmer than the 1900s. The biggest change is in January (+2.9°). The shift is larger than in 89% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Oak Glen’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 37° to 53°. August is the most reliable, staying within 5°.
Common questions about Oak Glen’s climate
What is the coldest month in Oak Glen?
December, with a typical high of 54° and a low of 35°.
What is the hottest month in Oak Glen?
August, with a typical high of 88° and a low of 61°. About 18 days a year reach 90°.
How much snow does Oak Glen get?
About 31 inches in a normal winter, most of it in February.
When is the first frost in Oak Glen?
In half of years the first 32° night comes by October 24, and the last spring frost by May 16.
What is the rainiest month in Oak Glen?
February, with 6.1 inches of rain and melted snow. The year totals 28 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Oak Glen itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Idyllwild Fire Dept, CA (25 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.