Highest Daily Low Temperatures in Riverside History

This is a list of the hottest daily low temperatures ever recorded in Riverside, California history from 1893–2024 based on data from the NOAA.

Highest temperatures all-time

Record for the highest daily low temperature in Riverside

The highest low temperature for a calendar day in Riverside, California history was 80 °F which has happened twice, most recently on Sunday September 4, 2022.

Rank	Temperature	Date
1	80 °F	September 4, 2022
1	80 °F	September 21, 1939
3	79 °F	July 7, 2018
3	79 °F	September 9, 2015
3	79 °F	August 30, 2013
3	79 °F	August 17, 2012
7	78 °F	September 3, 2022
7	78 °F	September 6, 2020
7	78 °F	August 31, 2013
10	77 °F	September 5, 2022
10	77 °F	August 31, 1998
10	77 °F	August 12, 1994
10	77 °F	August 7, 1990
10	77 °F	August 31, 1967
15	76 °F	August 17, 2020
15	76 °F	September 2, 2017
15	76 °F	September 1, 2017
15	76 °F	August 31, 2017
15	76 °F	August 29, 2017
15	76 °F	September 10, 2015
15	76 °F	September 6, 2013
15	76 °F	September 3, 2013
15	76 °F	August 13, 2012
15	76 °F	August 26, 2010
15	76 °F	August 30, 1998
15	76 °F	August 14, 1994
15	76 °F	August 14, 1992
15	76 °F	September 9, 1984
15	76 °F	August 16, 1983
15	76 °F	August 9, 1983
15	76 °F	August 21, 1982
15	76 °F	August 16, 1909