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Weather extremes
How extreme does Pomona's weather get?
The hottest, coldest, wettest and snowiest days Pomona 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 Pomona has recorded — each shown against what a normal day that time of year looks like.
That is about 35°F hotter than a normal July afternoon in Pomona (typical high near 94°F).
The three most extreme on record
About 22°F colder than a normal January night in Pomona (typical low near 42°F).
The three most extreme on record
More rain in a single day than Pomona usually gets in the whole month of February (typical February total about 2.7 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.
Pomona's record heat sits well above even a hot day for the season — July's 129°F is about 35°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 Santa Ana Fire Stn (NOAA GHCN station USC00047888), about 36 km from the city centre.