Post Mountain, CA climate
Post Mountain has mild winters and warm summers, with plenty of rain. A typical July afternoon reaches 90°, a January night drops to 31°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Post Mountain feels like
Winter
Spring
Summer
Fall
Post Mountain weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 48° | 31° | 10.5" | 35° – 45° |
| February | 52° | 33° | 9.2" | 36° – 49° |
| March | 57° | 35° | 7.8" | 38° – 53° |
| April | 63° | 37° | 4.7" | 43° – 54° |
| May | 72° | 42° | 2.2" | 48° – 63° |
| June | 82° | 48° | 0.8" | 59° – 72° |
| July | 90° | 55° | 0.1" | 68° – 76° |
| August | 90° | 53° | 0.2" | 69° – 76° |
| September | 84° | 48° | 0.4" | 63° – 71° |
| October | 70° | 40° | 3.0" | 51° – 61° |
| November | 55° | 35° | 6.4" | 37° – 50° |
| December | 46° | 31° | 11.8" | 36° – 43° |
| Year | 67° | 41° | 56.9" |
“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 Post Mountain
Post Mountain gets 57 inches of rain and melted snow a year. December is the wettest month and July the driest.
How Post Mountain 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 Post Mountain averaged 1.3° warmer than the 1900s. The biggest change is in January (+2.1°). The shift is larger than in 55% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Post Mountain’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. May swings the most: between 1991 and 2020 its average temperature ranged from 48° to 63°. December is the most reliable, staying within 7°.
Common questions about Post Mountain’s climate
What is the coldest month in Post Mountain?
December, with a typical high of 46° and a low of 31°.
What is the hottest month in Post Mountain?
July, with a typical high of 90° and a low of 55°.
What is the rainiest month in Post Mountain?
December, with 11.8 inches of rain and melted snow. The year totals 57 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Post Mountain itself (about a 3-mile square). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.