Earliest and Latest Days of 90° 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 90 °F in Washington D.C. history. It is based on NOAA data from the years 1851–2024.

Also see:

Earliest 90 degree day in Washington D.C.?

The earliest in the year that Washington D.C. had a high temperature of at least 90 °F is March 22 which happened in 1907.

Latest 90 degree day in Washington D.C.?

The latest in the year that Washington D.C. had a high temperature of at least 90 °F is October 11 which happened in 1919.

Earliest Days ≥ 90 °F

Date	Year	Temperature
March 22	1907	90 °F
March 23	1907	93 °F
March 29	1907	92 °F
April 6	2010	90 °F
April 6	1942	92 °F
April 6	1929	92 °F
April 7	2010	90 °F
April 7	1929	94 °F
April 8	1929	93 °F
April 9	1959	90 °F
April 10	2013	91 °F
April 11	1930	91 °F
April 12	1977	90 °F
April 13	1977	90 °F
April 14	1960	91 °F
April 16	2002	92 °F
April 16	1976	91 °F
April 17	2002	95 °F
April 17	1976	93 °F
April 17	1896	92 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 11	1919	90 °F
October 10	1939	92 °F
October 9	2007	94 °F
October 9	1939	90 °F
October 8	2007	91 °F
October 7	2007	92 °F
October 7	1941	95 °F
October 6	2013	91 °F
October 6	1997	90 °F
October 6	1941	93 °F
October 5	2002	90 °F
October 5	1967	91 °F
October 5	1959	90 °F
October 5	1951	94 °F
October 5	1941	96 °F
October 4	2018	90 °F
October 4	2013	90 °F
October 4	1954	94 °F
October 4	1941	91 °F
October 4	1919	90 °F
October 4	1884	90 °F