Ontario, California gets 16 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Ontario averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 279 sunny days per year in Ontario. The US average is 205 sunny days.
Ontario gets some kind of precipitation, on average, 31 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.
Summer High: the July high is around 92 degrees
Winter Low: the January low is 43
Rain: averages 16 inches of rain a year
Snow: averages 0 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Ontario is 8.8 (10=best), which means it is more comfortable than most places in California.
8.8 / 10
May, June and October are the most pleasant months in Ontario, while August and July are the least comfortable months.