Key West Average Temperature by Month

This page shows the average temperature in each month of the year in Key West, Florida. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Key West?
In Key West, Florida, the warmest month is August, with an average daily high temperature of 90.0 °F and an average low of 80.2 °F.
What's the Coldest Month in Key West?
In Key West, Florida, the coolest month is January, with an average daily high temperature of 75.2 °F and an average low of 65.0 °F.
Month Avg. High Avg. Low
January 75.2 °F 65.0 °F
February 76.9 °F 66.8 °F
March 79.0 °F 68.8 °F
April 82.1 °F 72.7 °F
May 85.3 °F 76.0 °F
June 88.2 °F 79.0 °F
July 89.7 °F 80.3 °F
August 90.0 °F 80.2 °F
September 88.5 °F 79.0 °F
October 85.2 °F 76.6 °F
November 80.4 °F 71.9 °F
December 77.1 °F 67.9 °F
Year 83.2 °F 73.7 °F
Weather Station Details
Years Station Coordinates
1948–2024 Key West International Airport location
© H Brothers Inc, 2021–2024
Contact us | Privacy policy