Photo: Seauton, 4 March 2019 · CC BY-SA 4.0Perris reaches 100° on about 21 days a year, more than 95% of U.S. towns
A typical July afternoon reaches 94°, a January night drops to 41°, and snow is almost unheard of.
A year in Perris at a glance
Each month’s typical high and low, and what it brings.
What stands out about Perris’ climate
Compared with towns across the U.S., with Perris’ place in California beside it.
What a year in Perris feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 329 frost-free days a year
In half of years the last 32° night comes by January 28 and the first by December 18. Day counts come from NOAA’s station at March Afb, CA, 8 miles from the city’s center point, at about the same height; frost dates and degree days from Elsinore, CA, 10 miles away.
The 2023 USDA map puts Perris’ center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 28°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 10 inches of rain a year
February is the wettest month and June the driest. Rain falls on about 32 days a year. Snow is rare: about 0.2" in a normal year at Elsinore, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Perris
45% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Elsinore, CA.
Living with Perris’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
329 frost-free days in zone 9b. The last frost comes by Jan 28 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 18.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, October and November. 35 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Perris from natural hazards, river flooding is the largest share (54%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Perris and its neighbors
Every town next door is within a degree of Perris in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Perris’, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Perris, CA | 41° | 94° | 10" | 0.2" |
| Corona de Tucson, AZ | 36° | 96° | 14" | 0.1" |
| Fort Stockton, TX | 33° | 96° | 13" | 1.4" |
| Santa Teresa, NM | 33° | 95° | 9" | 2.0" |
| Medford, OR | 32° | 92° | 19" | 3.4" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
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°).
A bigger shift than in 94% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Perris compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Perris’ place among California’s.
Perris weather by month
Highs, lows and precipitation from NOAA’s grid at Perris’ center; snow, wet days and snow on the ground from Elsinore, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 67° | 41° | 2.2" | 0.0" | 6 | 0 | 49° – 61° |
| February | 67° | 42° | 2.6" | 0.0" | 6 | 0 | 48° – 63° |
| March | 70° | 44° | 1.4" | 0.0" | 5 | 0 | 51° – 64° |
| April | 75° | 47° | 0.6" | 0.2" | 3 | 0 | 56° – 64° |
| May | 79° | 51° | 0.2" | 0.0" | 1 | 0 | 60° – 72° |
| June | 87° | 56° | 0.0" | 0.0" | 0 | 0 | 67° – 76° |
| July | 94° | 61° | 0.1" | 0.0" | 1 | 0 | 73° – 83° |
| August | 96° | 62° | 0.1" | 0.0" | 1 | 0 | 76° – 82° |
| September | 91° | 59° | 0.1" | 0.0" | 1 | 0 | 72° – 79° |
| October | 82° | 52° | 0.4" | 0.0" | 2 | 0 | 63° – 72° |
| November | 74° | 45° | 0.8" | 0.0" | 3 | 0 | 52° – 64° |
| December | 66° | 40° | 1.3" | 0.0" | 5 | 0 | 49° – 61° |
| Year | 79° | 50° | 9.8" | 0.2" | 32 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 48° to 63°. August is the most reliable, staying within 6°.
Where Perris’ numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Perris’ center.
- Snow: Elsinore, CA.
- Frost dates, heating and cooling: Elsinore, CA, 10 miles away.
- Freezing nights, 90° and 100° days: March Afb, CA, 8 miles from the city’s center point, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Perris’ climate
What is the weather like in Perris?
A typical July afternoon reaches 94°, a January night drops to 41°, and snow is almost unheard of. Milder January nights than 90% of U.S. towns; hotter July afternoons than 93% of U.S. towns.
How cold does it get in Perris in winter?
December nights average 40°. About 25 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 49°.
How much snow does Perris get?
About 0.2 inches in a normal winter at Elsinore, CA, so most winters see none.
How hot does it get in Perris?
July, with a typical high of 94° and a low of 61°. About 100 days a year reach 90° and 21 reach 100° (Elsinore, CA).
When is the first and last frost in Perris?
In half of years the last spring frost (32°) comes by January 28 and the first fall frost by December 18, about 329 frost-free days, at Elsinore, CA.
What growing zone is Perris in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 28°.
What is the best time of year to visit Perris?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Perris getting warmer?
Yes: 1991–2020 averaged 2.2° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 94% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Perris.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.