Lowest Daily High Temperatures in Key West History

This is a list of the coldest daily high temperatures ever recorded in Key West, Florida history from 1948–2024 based on data from the NOAA.

Lowest temperatures all-time

Record for the lowest daily high temperature in Key West

The lowest high temperature for a calendar day in Key West, Florida history was 52 °F which has happened twice, most recently on Sunday January 10, 2010.

Rank	Temperature	Date
1	52 °F	January 10, 2010
1	52 °F	January 15, 1948
3	53 °F	December 24, 1989
4	54 °F	December 25, 1989
4	54 °F	December 26, 1983
4	54 °F	January 13, 1981
7	55 °F	February 5, 2009
7	55 °F	January 12, 1981
7	55 °F	January 10, 1970
7	55 °F	February 5, 1966
7	55 °F	December 13, 1962
7	55 °F	February 19, 1958
7	55 °F	February 3, 1951
14	56 °F	December 28, 2010
14	56 °F	January 11, 2010
14	56 °F	January 24, 2003
14	56 °F	January 22, 1985
14	56 °F	January 30, 1978
14	56 °F	January 29, 1978
20	57 °F	December 15, 2010
20	57 °F	February 14, 2010
20	57 °F	January 6, 2010
20	57 °F	January 18, 2003
20	57 °F	January 18, 1981
20	57 °F	March 3, 1980
20	57 °F	February 7, 1978
20	57 °F	January 10, 1978
20	57 °F	January 9, 1970
20	57 °F	January 15, 1964
20	57 °F	December 14, 1962
20	57 °F	January 22, 1960
20	57 °F	January 9, 1958