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Weather extremes
How extreme does Los Altos's weather get?
The hottest, coldest, wettest and snowiest days Los Altos 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 Los Altos has recorded — each shown against what a normal day that time of year looks like.
That is about 30°F hotter than a normal June afternoon in Los Altos (typical high near 76°F).
The three most extreme on record
About 58°F colder than a normal July night in Los Altos (typical low near 59°F).
The three most extreme on record
More rain in a single day than Los Altos usually gets in the whole month of December (typical December total about 2.5 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.
Los Altos's record heat sits well above even a hot day for the season — June's 106°F is about 30°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 Moffett Fed Airfield (NOAA GHCN station USW00023244), about 6 km from the city centre.