Earliest and Latest Days of 100° F in San Antonio

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

Also see:

Earliest 100 degree day in San Antonio?

The earliest in the year that San Antonio, Texas had a high temperature of at least 100 °F is February 21 which happened in 1996.

Latest 100 degree day in San Antonio?

The latest in the year that San Antonio, Texas had a high temperature of at least 100 °F is November 9 which happened in 1904.

Earliest Days ≥ 100 °F

Date	Year	Temperature
February 21	1996	100 °F
March 6	1991	100 °F
March 28	1971	100 °F
April 13	1982	100 °F
April 16	1920	101 °F
April 18	2006	100 °F
April 19	1996	101 °F
April 20	1984	100 °F
May 1	1929	101 °F
May 7	2022	101 °F
May 7	1998	100 °F
May 8	2022	101 °F
May 8	2009	100 °F
May 8	1967	101 °F
May 8	1933	100 °F
May 8	1927	103 °F
May 11	1967	100 °F
May 12	1967	101 °F
May 17	2022	100 °F
May 18	2022	101 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
November 9	1904	101 °F
October 16	1904	102 °F
October 15	1904	107 °F
October 14	1904	102 °F
October 13	1904	108 °F
October 10	1904	110 °F
October 9	1904	100 °F
October 6	1904	105 °F
October 5	1904	106 °F
October 4	1904	104 °F
October 3	1904	105 °F
October 2	1905	100 °F
October 2	1904	108 °F
October 1	1904	108 °F
September 30	1904	102 °F
September 28	2005	104 °F
September 27	2005	102 °F
September 27	1953	101 °F
September 26	2011	100 °F
September 26	2005	103 °F
September 26	1904	102 °F