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Weather extremes

How extreme does Rubidoux's weather get?

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

Based on 50+ years of daily weather observations (1971–present), from the Riverside Fire Stn 3 station 5 km away. Updated through March 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 Rubidoux has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
116°F Jul 22, 2006

That is about 21°F hotter than a normal July afternoon in Rubidoux (typical high near 95°F).

The three most extreme on record

1 116°F Jul 22, 2006
2 113°F Sep 13, 1971
3 113°F Aug 5, 1997
❄️ Coldest night
22°F Dec 7, 1998

About 20°F colder than a normal December night in Rubidoux (typical low near 42°F).

The three most extreme on record

1 22°F Dec 7, 1998
2 25°F Dec 12, 1972
3 25°F Jan 5, 1973
🌧️ Most rain in one day
2.75 in Feb 14, 2019

More rain in a single day than Rubidoux usually gets in the whole month of February (typical February total about 2.5 in).

The three most extreme on record

1 2.75 in Feb 14, 2019
2 2.50 in Oct 20, 2004
3 2.45 in Feb 28, 1991

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

Rubidoux's record heat sits well above even a hot day for the season — July's 116°F is about 21°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, Rubidoux's warmest days reach the high 90s°F and its coldest nights drop to the low 40s°F. But across the record it has gone as high as 116°F and as low as 22°F. A single day has delivered over 3 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 5 km from the city centre.

How we build these numbers →