Earliest and Latest Days of 90° F in Key West

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Key West, Florida history. It is based on NOAA data from the years 1948–2024.

Also see:

Earliest 90 degree day in Key West?

The earliest in the year that Key West, Florida had a high temperature of at least 90 °F is April 25 which happened in 1991.

Latest 90 degree day in Key West?

The latest in the year that Key West, Florida had a high temperature of at least 90 °F is October 28 which happened in 1960.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 25	1991	90 °F
April 26	2015	90 °F
April 26	1991	90 °F
May 13	2021	90 °F
May 13	1995	90 °F
May 14	2019	94 °F
May 15	1991	90 °F
May 16	1991	90 °F
May 16	1989	90 °F
May 16	1967	90 °F
May 17	2020	90 °F
May 17	1989	90 °F
May 17	1967	90 °F
May 17	1959	90 °F
May 18	1995	91 °F
May 18	1989	90 °F
May 19	2023	91 °F
May 20	2023	90 °F
May 20	1995	90 °F
May 20	1953	90 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 28	1960	91 °F
October 27	1960	91 °F
October 18	2007	90 °F
October 16	2009	91 °F
October 15	2023	90 °F
October 15	2009	90 °F
October 14	2015	90 °F
October 14	2009	90 °F
October 14	1993	90 °F
October 13	2018	90 °F
October 13	1960	91 °F
October 12	2007	90 °F
October 12	1950	91 °F
October 11	2009	90 °F
October 11	1960	90 °F
October 10	2023	90 °F
October 10	2009	90 °F
October 10	1989	90 °F
October 10	1960	90 °F
October 10	1950	90 °F