Riverside Average Temperature by Month

This page shows the average temperature in each month of the year in Riverside, California. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Riverside?
In Riverside, California, the warmest month is August, with an average daily high temperature of 95.6 °F and an average low of 64.3 °F.
What's the Coldest Month in Riverside?
In Riverside, California, the coolest month is January, with an average daily high temperature of 68.8 °F and an average low of 43.3 °F.
Month Avg. High Avg. Low
January 68.8 °F 43.3 °F
February 69.0 °F 44.3 °F
March 72.3 °F 46.8 °F
April 76.3 °F 49.6 °F
May 80.7 °F 54.7 °F
June 87.2 °F 58.7 °F
July 93.7 °F 63.7 °F
August 95.6 °F 64.3 °F
September 92.2 °F 61.6 °F
October 83.4 °F 55.1 °F
November 75.1 °F 47.1 °F
December 67.7 °F 42.4 °F
Year 80.2 °F 52.7 °F
Weather Station Details
Years Station Coordinates
1999–2024 Riverside Municipal Airport location
1893–1998 Riverside Fire Station location