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Key West city, Florida

Official LSAD Designation: Key West city • Census GEOID: 1236550 • Monroe County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Key West city.

Reference Weather Station: KEY W WFO, FL US (ID: USC00084571) • Located 1.1 miles from community center • Elevation: 1.2 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 74.7° 62.9° 68.8° 2.01"
February 76.5° 64.3° 70.4° 1.96"
March 78.8° 66.8° 72.8° 1.41"
April 82.7° 70.9° 76.8° 2.17"
May 85.6° 74.0° 79.8° 3.71"
June 88.0° 76.8° 82.4° 4.81"
July 89.8° 77.8° 83.8° 4.48"
August 89.7° 78.5° 84.1° 6.13"
September 88.3° 77.0° 82.7° 8.24"
October 85.2° 74.6° 79.9° 6.01"
November 80.6° 69.8° 75.2° 3.28"
December 76.9° 66.0° 71.5° 2.22"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station KEY W WFO, FL US (ID: USC00084571) • 1.1 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at KEY W WFO, FL US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 70.0 74.3 78.5 82.8 87.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2013: Annual mean 78.0°F 2014: Annual mean 77.7°F 2015: Annual mean 79.5°F 2016: Annual mean 78.3°F 2017: Annual mean 78.5°F 2018: Annual mean 78.1°F 2019: Annual mean 79.0°F 2020: Annual mean 78.9°F 2021: Annual mean 78.2°F 2022: Annual mean 78.6°F 2023: Annual mean 79.4°F 2024: Annual mean 78.7°F 2025: Annual mean 78.4°F 2013: Annual mean of daily highs 83.2°F 2014: Annual mean of daily highs 83.2°F 2015: Annual mean of daily highs 84.8°F 2016: Annual mean of daily highs 83.7°F 2017: Annual mean of daily highs 84.0°F 2018: Annual mean of daily highs 83.2°F 2019: Annual mean of daily highs 84.2°F 2020: Annual mean of daily highs 84.1°F 2021: Annual mean of daily highs 83.5°F 2022: Annual mean of daily highs 83.9°F 2023: Annual mean of daily highs 84.8°F 2024: Annual mean of daily highs 83.9°F 2025: Annual mean of daily highs 83.9°F 2013: Annual mean of daily lows 72.8°F 2014: Annual mean of daily lows 72.1°F 2015: Annual mean of daily lows 74.2°F 2016: Annual mean of daily lows 72.9°F 2017: Annual mean of daily lows 73.0°F 2018: Annual mean of daily lows 72.9°F 2019: Annual mean of daily lows 73.7°F 2020: Annual mean of daily lows 73.8°F 2021: Annual mean of daily lows 73.0°F 2022: Annual mean of daily lows 73.2°F 2023: Annual mean of daily lows 74.0°F 2024: Annual mean of daily lows 73.5°F 2025: Annual mean of daily lows 72.9°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 Unavailable Unavailable Unavailable
2011 Unavailable Unavailable Unavailable
2012 Unavailable Unavailable Unavailable
2013 78.0 83.2 72.8
2014 77.7 83.2 72.1
2015 79.5 84.8 74.2
2016 78.3 83.7 72.9
2017 78.5 84.0 73.0
2018 78.1 83.2 72.9
2019 79.0 84.2 73.7
2020 78.9 84.1 73.8
2021 78.2 83.5 73.0
2022 78.6 83.9 73.2
2023 79.4 84.8 74.0
2024 78.7 83.9 73.5
2025 78.4 83.9 72.9
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.