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Weather extremes
How extreme does San Luis Obispo's weather get?
The hottest, coldest, wettest and snowiest days San Luis Obispo 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 Luis Obispo has recorded — each shown against what a normal day that time of year looks like.
That is about 26°F hotter than a normal September afternoon in San Luis Obispo (typical high near 89°F).
The three most extreme on record
About 26°F colder than a normal December night in San Luis Obispo (typical low near 33°F).
The three most extreme on record
More rain in a single day than San Luis Obispo usually gets in the whole month of October (typical October total about 0.7 in).
The three most extreme on record
Top recorded days
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 Luis Obispo's record heat sits well above even a hot day for the season — September's 115°F is about 26°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 Maria Public AP (NOAA GHCN station USW00023273), about 47 km from the city centre.