Earliest and Latest Days of 100° F in El Cajon

This is a list of the earliest and latest days in the year with a high temperature of at least 100 °F in El Cajon, California history. It is based on NOAA data from the years 1899–2024.

Also see:

Earliest 100 degree day in El Cajon?

The earliest in the year that El Cajon, California had a high temperature of at least 100 °F is April 5 which happened in 1989.

Latest 100 degree day in El Cajon?

The latest in the year that El Cajon, California had a high temperature of at least 100 °F is October 31 which happened in 1918.

Earliest Days ≥ 100 °F

Date	Year	Temperature
April 5	1989	102 °F
April 6	1989	104 °F
April 12	1940	104 °F
April 13	1940	105 °F
April 23	1910	102 °F
April 24	1910	101 °F
April 26	2004	100 °F
April 28	1921	101 °F
May 2	1947	100 °F
May 3	2004	104 °F
May 5	1990	100 °F
May 6	1990	100 °F
May 8	1923	101 °F
May 9	1923	102 °F
May 10	1934	101 °F
May 13	2013	101 °F
May 13	1927	103 °F
May 15	2014	104 °F
May 15	1956	100 °F
May 16	1956	101 °F

Latest Days ≥ 100 °F

Date	Year	Temperature
October 31	1918	101 °F
October 30	1918	100 °F
October 29	2008	100 °F
October 28	2008	100 °F
October 25	2017	102 °F
October 24	2017	105 °F
October 23	2017	104 °F
October 23	2003	100 °F
October 22	2003	100 °F
October 22	1917	102 °F
October 21	2003	102 °F
October 21	1929	104 °F
October 20	1927	100 °F
October 20	1921	101 °F
October 20	1917	100 °F
October 19	1940	104 °F
October 19	1927	101 °F
October 19	1921	103 °F
October 19	1913	100 °F
October 18	1958	100 °F
October 18	1940	104 °F