Riverside, CA Climate

Summary Graph

The summary climate graph for Riverside, CA shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Riverside, CA.


The warmest month in March Air Reserve Base, Riverside, California is August with an average high temperature of 93.0°F. The hottest day on record was September 12 1971 when the temperature hit 114.1°F. During January the overnight temperature drops to an average of 40.0°F with the lowest temperature of 17.1°F being recorded on December 21 1968.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

12 Sep 1971114.1°F
22 Jul 2006113°F
27 Jul 1934112.3°F
5 Aug 1997111.2°F
29 Aug 1998111.2°F

The warmest months on average were:

August 1998100.5°F
July 200698.7°F
August 201298.5°F
August 196798.5°F
August 199598.4°F

The coldest days on record are:

21 Dec 196817.1°F
9 Dec 197117.1°F
14 Jan 196318°F
7 Jan 197319.4°F
14 Jan 200719.4°F

The coldest months on average were:

December 201129.8°F
January 197232°F
January 193732°F
January 194932.6°F
December 196833°F


The wettest month by average rainfall in Riverside, CA is February with an average of 1.2 inches of rain falling on 7 to 8 days.Although in March it typically rains on more days with 0.8 inches falling in 7 to 8 days. The driest month by average rainfall in Riverside, CA is June with an average of 0.0 inches of rain falling on 3 to 4 days. Although in August it typically rains on less days with 0.1 inches falling in 1 to 2 days

Wettest Days

The wettest days on record are:

18 March 19822.3 inches
3 March 19832.3 inches
1 March 19781.9 inches
2 March 19811.6 inches
27 March 19911.3 inches

Wettest Months

The wettest months on record are:

February 19989.3 inches
January 19938.4 inches
February 19808.2 inches
December 20107.7 inches
January 19957 inches

Driest Months

The driest months on record are:

February 19330 inches
March 19330 inches
April 19330 inches
May 19330 inches
June 19330 inches
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