Average annual temperature is 17.0 °C
Absolute maximum temperature: 40.8 °C
Absolute minimum temperature: -8.9 °C
Number of sunny days: 276 days
Number of rainy days: 85 days
Number of snow days: 4 days
Look at detailed online map of Riverside
* Weather data for Riverside United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.6 | 19.6 | 22.5 | 31.8 | 31.6 | 38.9 | 40.8 | 40.7 | 37.3 | 31.6 | 26.9 | 20.3 |
| Average daytime temperature (°C) | 11.4 | 13.7 | 17.6 | 25.2 | 28.4 | 33.2 | 38.5 | 35.2 | 32.2 | 26.9 | 19.6 | 15.2 |
| Average temperature (°C) | 4.3 | 5.6 | 10.2 | 16.7 | 21.0 | 25.9 | 30.6 | 27.8 | 24.2 | 18.7 | 11.5 | 6.5 |
| Average night temperature (°C) | -0.8 | -0.5 | 3.3 | 7.7 | 12.4 | 17.3 | 21.5 | 20.4 | 15.9 | 11.0 | 4.6 | 0.1 |
| Absolute minimum temperature (°C) | -7.3 | -8.9 | -6.1 | -3.6 | 7.3 | 11.3 | 17.1 | 17.7 | 11.4 | 0.8 | -2.4 | -4.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.3 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 8.4 | 10.0 | 11.8 | 12.5 | 12.9 | 12.5 | 11.8 | 10.9 | 10.2 | 9.3 | 8.3 |
| Precipitation (mm) | 51 | 29 | 31 | 0 | 10 | 0 | 2 | 24 | 21 | 7 | 15 | 22 |
| Sunny days | 20 | 16 | 19 | 28 | 24 | 29 | 26 | 19 | 22 | 27 | 23 | 23 |
| Rainy days | 10 | 10 | 12 | 1 | 7 | 1 | 5 | 12 | 8 | 4 | 7 | 8 |
| Snow days | 1 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Riverside is at