Earliest and Latest Days of 100° F in McKinney

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in McKinney, Texas history. It is based on NOAA data from the years 1903–2024.

Also see:

Earliest 100 degree day in McKinney?

The earliest in the year that McKinney, Texas had a high temperature of at least 100 °F is May 3 which happened in 1920.

Latest 100 degree day in McKinney?

The latest in the year that McKinney, Texas had a high temperature of at least 100 °F is September 30 which happened in 1953.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 3	1920	103 °F
May 19	1936	100 °F
May 27	1928	101 °F
May 28	1927	105 °F
May 30	2003	101 °F
June 1	1998	100 °F
June 2	1998	100 °F
June 2	1913	101 °F
June 3	1960	100 °F
June 4	1960	100 °F
June 6	1977	100 °F
June 6	1948	100 °F
June 8	1956	100 °F
June 10	1934	102 °F
June 11	2022	101 °F
June 11	1953	101 °F
June 11	1924	100 °F
June 11	1918	100 °F
June 12	1968	100 °F
June 12	1953	105 °F
June 12	1924	101 °F
June 12	1918	104 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
September 30	1953	100 °F
September 29	2011	100 °F
September 29	1953	101 °F
September 28	1953	106 °F
September 27	1953	102 °F
September 27	1921	100 °F
September 26	1938	101 °F
September 25	2005	100 °F
September 25	1938	100 °F
September 25	1931	102 °F
September 24	1921	100 °F
September 23	1938	100 °F
September 23	1931	100 °F
September 23	1921	101 °F
September 22	2005	100 °F
September 22	1921	100 °F
September 21	1956	100 °F
September 21	1921	100 °F
September 20	2021	100 °F
September 20	1954	100 °F
September 20	1953	102 °F