All-time weather records — Key West, FL

Record high
95.0°F
July 18, 2023
Record low
45.0°F
January 31, 2022
Wettest day
11.36 in
September 12, 2020

Climate change signal in Key West

85.5%

of Key West's all-time daily heat records were set in the last decade (313 of 366 records since 2015).

64.2%

of all-time daily cold records were set in the last decade (235 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
2010s
191
238
2020s
175
128

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 2012, the latest in 2026. Period of observation: 2012-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 84.9°F — Jan 1, 2016 45.0°F — Jan 31, 2022 4.70 in — Jan 4, 2014
February 86.0°F — Feb 24, 2023 46.0°F — Feb 25, 2026 6.62 in — Feb 24, 2025
March 86.0°F — Mar 5, 2023 53.1°F — Mar 5, 2013 3.23 in — Mar 29, 2025
April 89.1°F — Apr 12, 2020 61.0°F — Apr 9, 2017 5.26 in — Apr 29, 2015
May 91.9°F — May 17, 2024 63.0°F — May 8, 2017 4.36 in — May 2, 2013
June 93.0°F — Jun 21, 2023 71.1°F — Jun 1, 2012 4.23 in — Jun 7, 2017
July 95.0°F — Jul 18, 2023 72.0°F — Jul 3, 2013 5.67 in — Jul 6, 2021
August 93.9°F — Aug 7, 2023 71.1°F — Aug 21, 2020 5.72 in — Aug 20, 2019
September 93.0°F — Sep 2, 2020 70.0°F — Sep 24, 2023 11.36 in — Sep 12, 2020
October 91.0°F — Oct 3, 2024 55.9°F — Oct 31, 2017 2.69 in — Oct 5, 2017
November 90.0°F — Nov 4, 2015 54.0°F — Nov 26, 2012 2.86 in — Nov 7, 2020
December 86.0°F — Dec 7, 2025 48.9°F — Dec 27, 2020 3.90 in — Dec 22, 2019

Click a month to see every daily record for that month in Key West.