Earliest and Latest Days of 100° F in Dayton

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Dayton, Ohio history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 100 degree day in Dayton?

The earliest in the year that Dayton, Ohio had a high temperature of at least 100 °F is June 11 which happened in 1911.

Latest 100 degree day in Dayton?

The latest in the year that Dayton, Ohio had a high temperature of at least 100 °F is September 14 which happened in 1897.

Earliest Days ≥ 100 °F

Date	Year	Temperature
June 11	1911	100 °F
June 18	1944	101 °F
June 25	1988	102 °F
June 27	1944	102 °F
June 28	2012	102 °F
June 28	1944	102 °F
June 28	1934	101 °F
June 29	1934	100 °F
July 1	1941	100 °F
July 3	1921	100 °F
July 3	1911	100 °F
July 3	1897	102 °F
July 4	1921	101 °F
July 4	1911	102 °F
July 4	1897	104 °F
July 5	1921	101 °F
July 5	1911	107 °F
July 5	1897	100 °F
July 6	2012	102 °F
July 6	1921	100 °F
July 6	1911	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 14	1897	101 °F
September 13	1897	100 °F
September 6	1954	101 °F
September 5	1899	102 °F
September 3	1913	101 °F
September 2	1913	101 °F
August 31	1951	100 °F
August 22	1936	100 °F
August 20	1916	100 °F
August 19	1936	100 °F
August 17	1988	102 °F
August 12	1918	101 °F
August 10	1911	101 °F
August 6	1918	104 °F
August 5	1918	105 °F
August 3	1964	100 °F
August 3	1897	100 °F
July 31	1913	101 °F
July 30	1941	101 °F
July 30	1916	100 °F
July 30	1913	103 °F