Riverside Temperatures: Averages 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
References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

California Temperatures
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