Earliest and Latest Days of 100° F in Antioch

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in Antioch, California history. It is based on NOAA data from the years 1915–2021.

Also see:

Earliest 100 degree day in Antioch?

The earliest in the year that Antioch, California had a high temperature of at least 100 °F is May 6 which happened in 2011.

Latest 100 degree day in Antioch?

The latest in the year that Antioch, California had a high temperature of at least 100 °F is October 5 which has happened 3 times, most recently in 1980.

Earliest Days ≥ 100 °F

Date	Year	Temperature
May 6	2011	104 °F
May 7	2011	103 °F
May 7	1987	100 °F
May 8	1987	101 °F
May 11	2011	102 °F
May 13	1927	100 °F
May 14	1976	100 °F
May 15	1927	103 °F
May 15	1924	100 °F
May 16	2008	100 °F
May 17	2009	100 °F
May 17	2008	101 °F
May 19	1947	100 °F
May 20	1947	101 °F
May 23	1943	100 °F
May 24	1982	100 °F
May 25	1982	100 °F
May 26	2020	101 °F
May 26	1933	102 °F
May 27	1974	100 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
October 5	1980	100 °F
October 5	1964	102 °F
October 5	1933	103 °F
October 4	1980	101 °F
October 4	1933	101 °F
October 3	1980	100 °F
September 30	1966	102 °F
September 28	1921	100 °F
September 27	2009	100 °F
September 27	1921	100 °F
September 26	1944	102 °F
September 25	2010	100 °F
September 25	1944	103 °F
September 24	1936	104 °F
September 23	2009	101 °F
September 23	1943	100 °F
September 23	1939	103 °F
September 23	1936	103 °F
September 22	2003	103 °F
September 22	1949	107 °F
September 22	1947	100 °F
September 22	1943	105 °F
September 22	1939	102 °F