The Official Website of Ontario, California
 
 
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Climate

 

 

Centrally located in the land of sunshine and opportunity, Southern California's Ontario enjoys a Mediterranean-like climate with moderate temperatures and low humidity year-round.

Ontario averages 312 days of sunshine annually and an average median temperature of 83 degrees Fahrenheit / 24 degrees Celsius. With an average annual rainfall of 16.1 inches and 23 average 'rainy days' annually, the 'rainy season' is between November and March. A few rainy days are generally followed by many days of brilliant sunshine and clear bright skies.

http://www.weather.com/weather/local/USCA0806?from=search_city

 
 
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