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Weather extremes
How extreme does San Bernardino's weather get?
The hottest, coldest, wettest and snowiest days San Bernardino has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days San Bernardino has recorded — each shown against what a normal day that time of year looks like.
That is about 23°F hotter than a normal July afternoon in San Bernardino (typical high near 95°F).
The three most extreme on record
About 22°F colder than a normal January night in San Bernardino (typical low near 41°F).
The three most extreme on record
More rain in a single day than San Bernardino usually gets in the whole month of December (typical December total about 2.0 in).
The three most extreme on record
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.
San Bernardino's record heat sits well above even a hot day for the season — July's 118°F is about 23°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
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 20 km from the city centre.