Rialto, CA enjoys a hot-summer Mediterranean climate with mild winters. During summer months the temperatures can reach highs of around 87 degrees Fahrenheit, while in winter the temperatures typically don't drop below 50° Fahrenheit. The area gets an average of 11 inches of rain per year spread out over about 53 days. Winters are generally dry with occasional rain and it is sunny most of the year, providing plenty of opportunity for outdoor activities throughout the year.
Rialto, California gets 14 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Rialto averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 282 sunny days per year in Rialto. The US average is 205 sunny days.
Rialto gets some kind of precipitation, on average, 40 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 95 degrees
Winter Low: the January low is 42
Rain: averages 14 inches of rain a year
Snow: averages 0 inches of snow a year