Earliest and Latest Days of 90° F in Philadelphia

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Philadelphia, Pennsylvania history. It is based on NOAA data from the years 1894–2024.

Also see:

Earliest 90 degree day in Philadelphia?

The earliest in the year that Philadelphia, Pennsylvania had a high temperature of at least 90 °F is April 12 which happened in 1977.

Latest 90 degree day in Philadelphia?

The latest in the year that Philadelphia, Pennsylvania had a high temperature of at least 90 °F is October 10 which happened in 1939.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 12	1977	92 °F
April 14	1941	91 °F
April 16	2002	90 °F
April 17	2002	95 °F
April 17	1976	92 °F
April 18	2002	90 °F
April 18	1976	94 °F
April 19	1985	90 °F
April 19	1976	90 °F
April 20	1976	90 °F
April 20	1941	92 °F
April 20	1927	90 °F
April 22	1985	90 °F
April 23	1960	91 °F
April 25	2009	90 °F
April 25	1960	92 °F
April 25	1915	90 °F
April 26	2009	93 °F
April 26	1990	92 °F
April 27	2009	92 °F
April 27	1994	90 °F
April 27	1990	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 10	1939	90 °F
October 7	1941	93 °F
October 6	1941	95 °F
October 6	1922	91 °F
October 5	1941	96 °F
October 4	1919	90 °F
October 2	2019	95 °F
October 2	1927	90 °F
October 1	1927	91 °F
September 30	1921	90 °F
September 27	1998	91 °F
September 26	2007	91 °F
September 26	1970	92 °F
September 25	2017	91 °F
September 25	1970	92 °F
September 25	1968	90 °F
September 24	2017	92 °F
September 24	2010	92 °F
September 24	1970	95 °F
September 23	2019	92 °F
September 23	1970	95 °F
September 23	1941	90 °F
September 23	1895	91 °F