Mountain Mesa, CA climate
Mountain Mesa has mild winters and hot summers, with very little rain. A typical July afternoon reaches 99°, a January night drops to 31°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mountain Mesa feels like
Winter
Spring
Summer
Fall
Mountain Mesa 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 | 60° | 31° | 1.8" | 41° – 52° |
| February | 62° | 34° | 1.8" | 40° – 56° |
| March | 67° | 38° | 1.3" | 45° – 60° |
| April | 73° | 42° | 0.5" | 52° – 62° |
| May | 82° | 49° | 0.3" | 57° – 73° |
| June | 92° | 57° | 0.1" | 68° – 79° |
| July | 99° | 63° | 0.1" | 76° – 84° |
| August | 97° | 61° | 0.1" | 76° – 83° |
| September | 92° | 55° | 0.1" | 69° – 77° |
| October | 80° | 45° | 0.3" | 58° – 68° |
| November | 67° | 36° | 0.8" | 43° – 58° |
| December | 58° | 30° | 1.5" | 41° – 49° |
| Year | 78° | 45° | 8.7" |
“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 Mountain Mesa
Mountain Mesa gets 9 inches of rain and melted snow a year. February is the wettest month and June the driest.
About 212 frost-free days a year
In half of years the last 32° night comes by April 5 and the first one by November 3. That leaves about 212 frost-free days for gardens, longer than 79% of U.S. towns.
Heating and cooling a home in Mountain Mesa
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mountain Mesa, 64% of that work is heating and 36% 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 Mountain Mesa 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 Mountain Mesa averaged 1.8° warmer than the 1900s. The biggest change is in June (+2.5°). The shift is larger than in 89% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mountain Mesa’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 57° to 73°. August is the most reliable, staying within 7°.
Common questions about Mountain Mesa’s climate
What is the coldest month in Mountain Mesa?
December, with a typical high of 58° and a low of 30°.
What is the hottest month in Mountain Mesa?
July, with a typical high of 99° and a low of 63°. About 114 days a year reach 90°.
When is the first frost in Mountain Mesa?
In half of years the first 32° night comes by November 3, and the last spring frost by April 5.
What is the rainiest month in Mountain Mesa?
February, with 1.8 inches of rain and melted snow. The year totals 9 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mountain Mesa itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at South Lake Fs, CA (2 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.