Riverside CA Average Temperatures by Month

The numbers here tell you how hot and cold the weather usually is in Riverside, California during each month of the year.

The average high and low temperatures are listed below for Riverside, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 80, 90 or 100 °F monthly and annually in Riverside, scroll down farther. There are also monthly and yearly counts of days with cold weather.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for Riverside, 2010 to 2019
High °F	Low °F		High °C	Low °C
69	45	January	21	7
69	45	February	21	7
72	48	March	22	9
79	52	April	26	11
80	55	May	26	13
88	60	June	31	16
94	65	July	34	18
95	66	August	35	19
92	64	September	33	18
85	57	October	29	14
75	49	November	24	10
67	45	December	20	7
81	54	Year	27	12

30-year temperature averages for Riverside, 1991 to 2020
High °F	Low °F		High °C	Low °C
68	44	January	20	6
68	45	February	20	7
72	47	March	22	8
76	50	April	24	10
80	55	May	27	13
87	59	June	30	15
93	64	July	34	18
95	65	August	35	18
91	62	September	33	17
83	55	October	28	13
75	47	November	24	9
67	43	December	19	6
80	53	Year	26	12

Days of Hot Weather in Riverside

Riverside often has 100-degree Fahrenheit weather in summer. The occasional spring or fall day will also get that hot.

Days per month in Riverside of at least 80, 90 or 100 °F
	80 °F 27 °C	90 °F 32 °C	100 °F 38 °C
January	4	0	0
February	5	0	0
March	7	1	0
April	10	3	0
May	16	6	1
June	25	12	2
July	31	24	5
August	31	25	8
September	27	19	6
October	19	9	1
November	9	2	0
December	2	0	0
Year	187	101	22

How Often Riverside Has Cold Temperatures

The coldest nights of winter at Riverside drop down to 32 °F (0 °C) or a little below. But the city averages only four nights a year when its that chilly.

Even after a frosty night, Riverside always warms up to above freezing during the day. In fact, every day of the year reaches at least 50 °F (10 °C).

Days per month on average in Riverside when the minimum temperature drops to 40 or 32 °F or below
	32 °F 0 °C	40 °F 4 °C
January	1	10
February	1	8
March	0	4
April	0	2
May	0	0
June	0	0
July	0	0
August	0	0
September	0	0
October	0	0
November	0	4
December	1	12
Year	4	40

Riverside Temperatures: Averages by Month

Days of Hot Weather in Riverside

How Often Riverside Has Cold Temperatures

References

More on Weather in California