Earliest and Latest Days of 90° F in San Luis Obispo

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in San Luis Obispo, California history. It is based on NOAA data from the years 1893–2024.

Also see:

Earliest 90 degree day in San Luis Obispo?

The earliest in the year that San Luis Obispo, California had a high temperature of at least 90 °F is January 15 which happened in 2021.

Latest 90 degree day in San Luis Obispo?

The latest in the year that San Luis Obispo, California had a high temperature of at least 90 °F is December 4 which happened in 1958.

Earliest Days ≥ 90 °F

Date	Year	Temperature
January 15	2021	91 °F
January 16	2014	91 °F
March 12	2007	90 °F
March 14	2015	90 °F
March 16	2014	90 °F
March 25	1930	90 °F
March 26	2015	90 °F
April 1	1966	91 °F
April 2	1985	90 °F
April 2	1959	92 °F
April 3	1985	90 °F
April 3	1966	90 °F
April 4	1961	94 °F
April 5	1961	90 °F
April 6	2022	96 °F
April 6	1989	98 °F
April 6	1931	92 °F
April 7	2022	91 °F
April 7	1989	100 °F
April 8	2022	93 °F
April 8	1989	104 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
December 4	1958	92 °F
November 22	2017	91 °F
November 22	1989	90 °F
November 21	2017	90 °F
November 18	1936	90 °F
November 17	2019	91 °F
November 17	2008	90 °F
November 16	2008	91 °F
November 15	2008	93 °F
November 14	2008	91 °F
November 13	2021	90 °F
November 12	2021	90 °F
November 11	1990	90 °F
November 11	1956	90 °F
November 10	2016	93 °F
November 10	1956	96 °F
November 9	2016	93 °F
November 9	1956	95 °F
November 8	1956	90 °F
November 7	2016	90 °F
November 7	2006	91 °F
November 7	1991	90 °F