Earliest and Latest Days of 100° F in Quincy

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Quincy, Illinois history. It is based on NOAA data from the years 1901–2024.

Also see:

Earliest 100 degree day in Quincy?

The earliest in the year that Quincy, Illinois had a high temperature of at least 100 °F is May 30 which happened in 1934.

Latest 100 degree day in Quincy?

The latest in the year that Quincy, Illinois had a high temperature of at least 100 °F is September 29 which happened in 1953.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 30	1934	103 °F
May 31	1934	102 °F
June 1	1934	101 °F
June 2	1934	102 °F
June 6	1934	101 °F
June 9	1911	100 °F
June 10	1914	100 °F
June 10	1911	101 °F
June 11	1933	100 °F
June 12	1918	102 °F
June 15	1911	100 °F
June 16	1936	102 °F
June 17	1936	100 °F
June 17	1918	103 °F
June 19	1953	100 °F
June 19	1936	105 °F
June 19	1921	100 °F
June 19	1913	100 °F
June 20	1936	104 °F
June 21	1988	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 29	1953	100 °F
September 28	1953	100 °F
September 15	1939	100 °F
September 15	1927	100 °F
September 13	1927	100 °F
September 10	1933	100 °F
September 9	2013	100 °F
September 9	1945	100 °F
September 9	1933	100 °F
September 9	1912	100 °F
September 8	1947	102 °F
September 7	1922	101 °F
September 6	1925	100 °F
September 6	1922	101 °F
September 6	1913	100 °F
September 5	1925	100 °F
September 4	1947	102 °F
September 4	1945	101 °F
September 4	1925	104 °F
September 4	1913	105 °F