Average temperature in Rialto (CA)
The mean minimum and maximum temperatures over the year in Rialto (California), the United States of America.
- Hot season / summer is in June, July, August and September.
- On average, the warmest month is August with 35°C.
- On average, the coolest month is December with 18°C.
- The average annual maximum temperature is 26°C.
- The average annual minimum temperature is 12°C.
Weather Forecasts for Rialto (CA)
almost clear and no rain
clear and no rain
clear and no rain