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	71.0°F (21.7°C)	47.8°F (8.8°C)	58.2°F (14.5°C)	0.49" (12.3 mm)
April	74.3°F (23.5°C)	51.4°F (10.8°C)	61.5°F (16.4°C)	0.46" (11.6 mm)
May	80.3°F (26.8°C)	56.5°F (13.6°C)	66.5°F (19.2°C)	0.25" (6.4 mm)
June	87.4°F (30.8°C)	61.1°F (16.2°C)	72.4°F (22.4°C)	0.00" (0.0 mm)
July	94.1°F (34.5°C)	67.1°F (19.5°C)	79.0°F (26.1°C)	0.01" (0.1 mm)
August	93.5°F (34.2°C)	65.8°F (18.8°C)	77.7°F (25.4°C)	0.00" (0.0 mm)
September	91.4°F (33.0°C)	64.0°F (17.8°C)	75.6°F (24.2°C)	0.03" (0.7 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)