Earliest and Latest Days of 90° F in Antioch

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Antioch, California history. It is based on NOAA data from the years 1915–2021.

Also see:

Earliest 90 degree day in Antioch?

The earliest in the year that Antioch, California had a high temperature of at least 90 °F is March 27 which happened in 1923.

Latest 90 degree day in Antioch?

The latest in the year that Antioch, California had a high temperature of at least 90 °F is October 25 which has happened twice, most recently in 1965.

Earliest Days ≥ 90 °F

Date	Year	Temperature
March 27	1923	90 °F
March 28	1923	92 °F
April 5	1924	96 °F
April 6	1924	90 °F
April 6	1916	91 °F
April 9	1989	90 °F
April 10	1989	90 °F
April 12	1988	90 °F
April 12	1947	91 °F
April 13	1947	92 °F
April 14	1990	90 °F
April 14	1962	90 °F
April 14	1947	94 °F
April 15	2011	93 °F
April 15	1985	92 °F
April 15	1947	94 °F
April 16	2011	94 °F
April 16	1964	90 °F
April 17	1954	90 °F
April 18	1939	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 25	1965	90 °F
October 25	1944	90 °F
October 23	1929	90 °F
October 22	1929	90 °F
October 21	1991	91 °F
October 21	1929	91 °F
October 20	1991	90 °F
October 20	1964	90 °F
October 19	1940	90 °F
October 19	1933	90 °F
October 19	1928	93 °F
October 18	2020	91 °F
October 18	1974	90 °F
October 18	1961	93 °F
October 18	1940	90 °F
October 18	1933	91 °F
October 18	1928	90 °F
October 17	2020	94 °F
October 17	2011	91 °F
October 17	1974	92 °F
October 17	1961	96 °F
October 17	1959	90 °F
October 17	1933	94 °F