Riverside County · California
Riverside, CA weather averages
NOAA climate normals for 1991-2020, measured at Riverside Muni Ap, 7.5 km from the city centre — month by month temperature, rain and snow.
Quick answer
Riverside averages a daily high of 78.8°F and a daily low of 52.9°F across the year, with 12.4 inches of precipitation. August is the warmest month at 94.3°F and December the coldest at 42.5°F.
- Average annual high
- 78.8°FWarmest month August
- Average annual low
- 52.9°FColdest month December
- Precipitation per year
- 12.4 inWettest month February
- Snowfall per year
- —2.5 days at or below 32°F
Riverside weather month by month
Normal daily high and low, precipitation and snowfall for each month, 1991-2020.
| Month | High °F | Low °F | Precip in | Snow in | Range |
|---|---|---|---|---|---|
| January | 66.5 | 43.3 | 2.94 | — | 43.3 to 66.5 degrees |
| February | 67.2 | 44.2 | 3.04 | — | 44.2 to 67.2 degrees |
| March | 71 | 46.5 | 2.01 | — | 46.5 to 71 degrees |
| April | 75.3 | 50.4 | 0.8 | — | 50.4 to 75.3 degrees |
| May | 80.2 | 55.6 | 0.3 | — | 55.6 to 80.2 degrees |
| June | 84.8 | 59.7 | 0.1 | — | 59.7 to 84.8 degrees |
| July | 92.9 | 63.9 | 0.07 | — | 63.9 to 92.9 degrees |
| August | 94.3 | 64.5 | 0.08 | — | 64.5 to 94.3 degrees |
| September | 90.3 | 61.9 | 0.25 | — | 61.9 to 90.3 degrees |
| October | 81.8 | 54.9 | 0.28 | — | 54.9 to 81.8 degrees |
| November | 73.8 | 46.9 | 1 | — | 46.9 to 73.8 degrees |
| December | 66.6 | 42.5 | 1.53 | — | 42.5 to 66.6 degrees |
Source: NOAA NCEI, U.S. Climate Normals 1991-2020 — station USW00003171, Riverside Muni Ap · rates as published for 1991-2020 normals
How to read Riverside climate normals
What a climate normal is, and what it is not.
A normal is the average of thirty years of daily observations at one station — here Riverside Muni Ap, 7.5 km from the centre of Riverside. It describes a typical year, so any single year will run warmer, cooler, wetter or drier. Readings taken at an airport on the edge of town usually sit a degree or two below a dense downtown on summer nights. Riverside sees about 86.4 days a year at or above 90°F.
Keep going
Other Riverside data on this site.