Climate by Month - Riverside, California Weather Summary

Month	High	Low	Average	Precipitation
January	67.5°F (19.7°C)	46.2°F (7.9°C)	55.7°F (13.1°C)	1.92" (48.6 mm)
February	69.2°F (20.7°C)	46.8°F (8.2°C)	56.5°F (13.6°C)	1.54" (39.2 mm)
March	72.0°F (22.2°C)	48.2°F (9.0°C)	58.7°F (14.8°C)	0.42" (10.7 mm)
April	73.7°F (23.2°C)	50.9°F (10.5°C)	61.0°F (16.1°C)	0.55" (14.0 mm)
May	79.5°F (26.4°C)	55.9°F (13.3°C)	65.9°F (18.8°C)	0.22" (5.4 mm)
June	86.5°F (30.3°C)	60.6°F (15.9°C)	71.7°F (22.0°C)	0.00" (0.0 mm)
July	92.8°F (33.8°C)	66.2°F (19.0°C)	77.8°F (25.5°C)	0.01" (0.1 mm)
August	93.1°F (33.9°C)	65.3°F (18.5°C)	77.4°F (25.2°C)	0.00" (0.0 mm)
September	91.5°F (33.0°C)	64.0°F (17.8°C)	75.6°F (24.2°C)	0.03" (0.6 mm)
October	81.5°F (27.5°C)	57.6°F (14.2°C)	67.9°F (19.9°C)	0.04" (1.1 mm)
November	77.2°F (25.1°C)	53.0°F (11.7°C)	63.3°F (17.4°C)	0.79" (20.0 mm)
December	66.0°F (18.9°C)	45.3°F (7.4°C)	54.2°F (12.3°C)	1.44" (36.6 mm)