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Weather extremes
How extreme does Key West's weather get?
The hottest, coldest, wettest and snowiest days Key West 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 Key West has recorded — each shown against what a normal day that time of year looks like.
That is about 5°F hotter than a normal July afternoon in Key West (typical high near 90°F).
The three most extreme on record
About 18°F colder than a normal January night in Key West (typical low near 63°F).
The three most extreme on record
More rain in a single day than Key West usually gets in the whole month of September (typical September total about 8.2 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.
Key West's record heat sits well above even a hot day for the season — July's 95°F is about 5°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 Key W Wfo (NOAA GHCN station USC00084571), inside the city.