Earliest and Latest Days of 100° F in Washington D.C.

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Washington D.C. history. It is based on NOAA data from the years 1851–2024.

Also see:

Earliest 100 degree day in Washington D.C.?

The earliest in the year that Washington D.C. had a high temperature of at least 100 °F is June 5 which happened in 1925.

Latest 100 degree day in Washington D.C.?

The latest in the year that Washington D.C. had a high temperature of at least 100 °F is September 8 which happened in 1939.

Earliest Days ≥ 100 °F

Date	Year	Temperature
June 5	1925	100 °F
June 9	2011	102 °F
June 9	1933	100 °F
June 9	1874	102 °F
June 10	1964	100 °F
June 11	1911	101 °F
June 15	1994	101 °F
June 22	1988	101 °F
June 24	2010	100 °F
June 25	1997	100 °F
June 26	1954	100 °F
June 26	1952	101 °F
June 28	1969	100 °F
June 29	2012	104 °F
June 29	1959	100 °F
June 29	1934	101 °F
June 29	1874	101 °F
June 30	1959	100 °F
July 1	1901	102 °F
July 2	1901	100 °F
July 2	1898	101 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 8	1939	100 °F
September 7	1881	104 °F
September 2	1980	101 °F
September 2	1953	100 °F
August 31	1953	100 °F
August 31	1932	100 °F
August 27	1987	100 °F
August 21	1874	100 °F
August 20	1983	101 °F
August 20	1874	100 °F
August 17	1997	105 °F
August 17	1988	102 °F
August 16	1997	102 °F
August 15	2016	100 °F
August 15	1988	103 °F
August 14	2016	100 °F
August 14	1943	100 °F
August 13	2016	101 °F
August 13	2002	100 °F
August 13	1881	101 °F