Average annual temperature is 20.4 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: -1.1 °C
Number of sunny days: 171 days
Number of rainy days: 194 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) | 24.7 | 28.6 | 30.2 | 31.1 | 33.9 | 35.5 | 37.2 | 38.8 | 32.1 | 29.5 | 26.7 | 24.5 |
| Average daytime temperature (°C) | 19.0 | 22.3 | 23.9 | 27.0 | 28.6 | 31.2 | 34.4 | 35.5 | 29.7 | 25.2 | 19.9 | 16.6 |
| Average temperature (°C) | 13.1 | 16.2 | 17.6 | 20.5 | 22.7 | 25.5 | 28.5 | 29.3 | 24.5 | 19.7 | 14.8 | 11.7 |
| Average night temperature (°C) | 8.5 | 11.7 | 12.5 | 14.9 | 17.6 | 21.0 | 23.9 | 24.5 | 20.2 | 14.8 | 10.9 | 7.9 |
| Absolute minimum temperature (°C) | -1.1 | 0.7 | 0.4 | 8.8 | 11.5 | 17.8 | 21.5 | 22.6 | 16.1 | 8.7 | 0.9 | 0.3 |
| 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) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.3 | 12.4 | 11.4 | 10.6 | 10.2 |
| 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 | 10.0 |
| Sunshine mean duration (h) | 7.1 | 8.1 | 9.0 | 9.4 | 10.6 | 10.2 | 11.3 | 11.1 | 9.6 | 9.1 | 6.8 | 6.5 |
| Precipitation (mm) | 151 | 92 | 121 | 84 | 71 | 166 | 115 | 161 | 55 | 28 | 71 | 194 |
| Sunny days | 14 | 15 | 15 | 13 | 15 | 7 | 3 | 8 | 15 | 25 | 19 | 22 |
| Rainy days | 17 | 13 | 16 | 17 | 16 | 23 | 28 | 23 | 15 | 6 | 11 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Riverside is at