Lowest Daily High Temperatures in San Luis Obispo History

This is a list of the coldest daily high temperatures ever recorded in San Luis Obispo, California history from 1893–2024 based on data from the NOAA.

Lowest temperatures all-time

Record for the lowest daily high temperature in San Luis Obispo

The lowest high temperature for a calendar day in San Luis Obispo, California history was 40 °F which happened on Sunday, December 11, 1932.

Rank	Temperature	Date
1	40 °F	December 11, 1932
2	41 °F	December 10, 1972
2	41 °F	January 8, 1937
4	42 °F	December 12, 1932
5	43 °F	December 22, 1990
5	43 °F	January 20, 1937
7	44 °F	December 23, 1990
7	44 °F	January 23, 1962
7	44 °F	January 12, 1949
10	45 °F	January 29, 1957
10	45 °F	January 11, 1949
10	45 °F	January 10, 1949
10	45 °F	January 31, 1939
10	45 °F	January 21, 1937
10	45 °F	December 10, 1932
10	45 °F	January 9, 1930
10	45 °F	January 20, 1929
18	46 °F	March 15, 1999
18	46 °F	February 6, 1976
18	46 °F	December 21, 1968
18	46 °F	December 15, 1967
18	46 °F	March 17, 1963
18	46 °F	January 22, 1962
18	46 °F	January 7, 1955
18	46 °F	January 25, 1949
18	46 °F	January 7, 1937
18	46 °F	January 21, 1933