Earliest and Latest Days of 80° F in Key West

This is a list of the earliest and latest days in the year with a high temperature of at least 80 °F in Key West, Florida history. It is based on NOAA data from the years 1948–2024.

Also see:

Earliest 80 degree day in Key West?

The earliest in the year that Key West, Florida had a high temperature of at least 80 °F is January 1 which has happened 28 times, most recently in 2023.

Latest 80 degree day in Key West?

The latest in the year that Key West, Florida had a high temperature of at least 80 °F is December 31 which has happened 27 times, most recently in 2022.

Earliest Days ≥ 80 °F

Date	Year	Temperature
January 1	2023	83 °F
January 1	2022	81 °F
January 1	2019	83 °F
January 1	2016	84 °F
January 1	2015	80 °F
January 1	2014	82 °F
January 1	2010	80 °F
January 1	2008	82 °F
January 1	2007	80 °F
January 1	2006	80 °F
January 1	2003	80 °F
January 1	1997	80 °F
January 1	1996	82 °F
January 1	1995	80 °F
January 1	1991	81 °F
January 1	1990	82 °F
January 1	1989	81 °F
January 1	1983	80 °F
January 1	1982	82 °F
January 1	1979	80 °F
January 1	1975	80 °F
January 1	1974	81 °F
January 1	1973	80 °F
January 1	1970	80 °F
January 1	1968	81 °F
January 1	1961	83 °F
January 1	1952	80 °F
January 1	1948	82 °F

Latest Days ≥ 80 °F

Date	Year	Temperature
December 31	2022	82 °F
December 31	2021	81 °F
December 31	2019	81 °F
December 31	2018	82 °F
December 31	2015	84 °F
December 31	2014	80 °F
December 31	2011	80 °F
December 31	2007	82 °F
December 31	2005	80 °F
December 31	1996	82 °F
December 31	1990	81 °F
December 31	1989	82 °F
December 31	1988	80 °F
December 31	1986	80 °F
December 31	1982	81 °F
December 31	1981	83 °F
December 31	1977	80 °F
December 31	1975	80 °F
December 31	1974	80 °F
December 31	1973	80 °F
December 31	1971	80 °F
December 31	1969	80 °F
December 31	1968	81 °F
December 31	1966	80 °F
December 31	1964	80 °F
December 31	1952	80 °F
December 31	1951	80 °F