Perris, CA climate
Perris has warm winters and hot summers, with very little rain. A typical July afternoon reaches 94°, a January night drops to 41°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Perris feels like
Winter
Spring
Summer
Fall
Perris 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 | 67° | 41° | 2.2" | 0 | 6 | 0 | 49° – 61° |
| February | 67° | 42° | 2.6" | 0 | 6 | 0 | 48° – 63° |
| March | 70° | 44° | 1.4" | 0 | 5 | 0 | 51° – 64° |
| April | 75° | 47° | 0.6" | 0.2" | 3 | 0 | 56° – 64° |
| May | 79° | 51° | 0.2" | 0 | 1 | 0 | 60° – 72° |
| June | 87° | 56° | 0.0" | 0 | 0 | 0 | 67° – 76° |
| July | 94° | 61° | 0.1" | 0 | 1 | 0 | 73° – 83° |
| August | 96° | 62° | 0.1" | 0 | 1 | 0 | 76° – 82° |
| September | 91° | 59° | 0.1" | 0 | 1 | 0 | 72° – 79° |
| October | 82° | 52° | 0.4" | 0 | 2 | 0 | 63° – 72° |
| November | 74° | 45° | 0.8" | 0 | 3 | 0 | 52° – 64° |
| December | 66° | 40° | 1.3" | 0 | 5 | 0 | 49° – 61° |
| Year | 79° | 50° | 9.8" | 0.2" | 32 | 0 |
“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 Perris
Perris gets 10 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 32 days a year.
About 329 frost-free days a year
In half of years the last 32° night comes by January 28 and the first one by December 18. That leaves about 329 frost-free days for gardens, longer than 96% of U.S. towns.
Heating and cooling a home in Perris
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Perris, 45% of that work is heating and 55% 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.
Perris and its neighbors
Perris borders 7 towns with climate data. January nights across them vary by 2.2°. Romoland has the coldest January nights (40°) and Moreno Valley the hottest July afternoons (95°). Perris’s January low is 41° and its July high 94°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Perris 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 Perris averaged 2.2° warmer than the 1900s. The biggest change is in January (+3.2°). The shift is larger than in 97% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Perris’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 48° to 63°. August is the most reliable, staying within 6°.
Common questions about Perris’s climate
What is the coldest month in Perris?
December, with a typical high of 66° and a low of 40°.
What is the hottest month in Perris?
August, with a typical high of 96° and a low of 62°. About 123 days a year reach 90°.
How much snow does Perris get?
Almost none. A normal year brings 0.2 inches.
When is the first frost in Perris?
In half of years the first 32° night comes by December 18, and the last spring frost by January 28.
What is the rainiest month in Perris?
February, with 2.6 inches of rain and melted snow. The year totals 10 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Perris itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Elsinore, CA (10 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.