Earliest and Latest Days of 100° F in Jacksonville

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Jacksonville, Florida history. It is based on NOAA data from the years 1871–2024.

Also see:

Earliest 100 degree day in Jacksonville?

The earliest in the year that Jacksonville, Florida had a high temperature of at least 100 °F is May 13 which happened in 1967.

Latest 100 degree day in Jacksonville?

The latest in the year that Jacksonville, Florida had a high temperature of at least 100 °F is September 4 which happened in 1944.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 13	1967	100 °F
May 27	2019	100 °F
June 1	1953	100 °F
June 1	1945	100 °F
June 2	1985	100 °F
June 3	1985	100 °F
June 4	1985	100 °F
June 7	1993	100 °F
June 9	1995	100 °F
June 9	1947	100 °F
June 9	1872	101 °F
June 10	1954	100 °F
June 11	1941	100 °F
June 12	1941	101 °F
June 13	1977	100 °F
June 13	1880	100 °F
June 14	2010	100 °F
June 14	1998	101 °F
June 14	1880	100 °F
June 15	2010	102 °F
June 15	1998	101 °F
June 15	1981	102 °F
June 15	1880	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 4	1944	100 °F
August 22	1900	100 °F
August 21	1900	101 °F
August 20	1900	101 °F
August 17	1954	102 °F
August 12	1874	100 °F
August 10	1941	100 °F
August 9	1987	101 °F
August 9	1941	101 °F
August 8	1941	100 °F
August 7	1956	100 °F
August 6	1941	100 °F
August 5	1954	102 °F
August 2	1999	101 °F
August 1	1999	102 °F
August 1	1986	100 °F
July 31	1999	102 °F
July 31	1941	100 °F
July 31	1896	100 °F
July 30	2010	102 °F
July 30	1941	100 °F
July 30	1896	100 °F