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Weather extremes

How extreme does Perris's weather get?

The hottest, coldest, wettest and snowiest days Perris has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 15 years of daily weather observations (2011–present), from the March Afb station 13 km away. Updated through May 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Perris has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
116°F Sep 6, 2020

That is about 24°F hotter than a normal September afternoon in Perris (typical high near 92°F).

The three most extreme on record

1 116°F Sep 6, 2020
2 115°F Sep 5, 2020
3 113°F Sep 6, 2024
❄️ Coldest night
19°F Feb 5, 2020

About 19°F colder than a normal February night in Perris (typical low near 38°F).

The three most extreme on record

1 19°F Feb 5, 2020
2 22°F Dec 4, 2011
3 22°F Dec 5, 2011
🌧️ Most rain in one day
2.27 in Aug 30, 2012

More rain in a single day than Perris usually gets in the whole month of August (typical August total about 0.4 in).

The three most extreme on record

1 2.27 in Aug 30, 2012
2 2.06 in Feb 5, 2024
3 1.97 in Aug 20, 2023

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-10°10°30°50°70°90°110°130° all-time high 116°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Perris's record heat sits well above even a hot day for the season — September's 116°F is about 24°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Perris's warmest days reach the mid-90s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 116°F and as low as 19°F. A single day has delivered over 2 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Riverside Fire Stn 3 (NOAA GHCN station USC00047470), about 24 km from the city centre.

How we build these numbers →