Rialto, CA Weather
Rialto, CA climate is warm during summer when temperatures tend to be in the 70's and cool during winter when temperatures tend to be in the 50's.
The warmest month of the year is August with an average maximum temperature of 9.99 degrees Fahrenheit, while the coldest month of the year is December with an average minimum temperature of 9.99 degrees Fahrenheit.
Temperature variations between night and day tend to be relatively big during summer with a difference that can reach 33 degrees Fahrenheit, and moderate during winter with an average difference of 25 degrees Fahrenheit.
The annual average precipitation at Rialto is 9.99 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is March with an average rainfall of 5.89 Inches.
Weather Data
Normal Climate
Normal Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °F | 67.0 | 68.8 | 70.7 | 76.6 | 81.3 | 89.5 | 96.0 | 96.2 | 91.4 | 83.0 | 73.4 | 67.7 | 80.1 |
| Mean °F | 54.4 | 56.2 | 58.0 | 62.7 | 67.5 | 73.8 | 79.6 | 80.1 | 76.3 | 68.4 | 59.4 | 54.5 | 65.9 |
| Min °F | 41.8 | 43.5 | 45.3 | 48.7 | 53.6 | 58.1 | 63.1 | 64.0 | 61.1 | 53.7 | 45.4 | 41.2 | 51.6 |
Normal Precipitation
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 5.18 | 5.13 | 5.89 | 1.28 | 0.61 | 0.16 | 0.02 | 0.20 | 0.38 | 0.68 | 1.99 | 2.97 | 9.99 |
