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July 17th, 2026 :: 12:40 am PDT   

Local Weather Report for
Ontario
California, United States

 Current Ontario Weather Conditions Updated July 16th at 11:53 pm 
Temperature:72°F Dew Point:63°F
Barometer:29.89 inHg Wind:N 17 Mph
Humidity:73.3% Visibility:0M
 
 Ontario Weather Forecast Summary  
 
Today
Jul 17th
Saturday
Jul 18th
Sunday
Jul 19th
Monday
Jul 20th
Tuesday
Jul 21st
Sunny Sunny Mostly Sunny Mostly Sunny Sunny
93°F
92°F
75°F
93°F
75°F
94°F
75°F
97°F
78°F
 
 Ontario Detailed Weather Forecast  
 
Friday, July 17th, 2026
Overnight Temperature: 78°F
Clear.
Morning Temperature: 83°F
Mostly sunny.
Afternoon Temperature: 91°F
Sunny. Windy at times.
Evening Temperature: 81°F
Clear. Windy at times.
Saturday, July 18th, 2026
Overnight Temperature: 75°F
Clear.
Morning Temperature: 81°F
Sunny.
Afternoon Temperature: 91°F
Sunny. Windy at times.
Evening Temperature: 81°F
Clear. Windy at times.
Sunday, July 19th, 2026
Overnight Temperature: 75°F
Mostly clear.
Morning Temperature: 80°F
Sunny.
Afternoon Temperature: 92°F
Mostly sunny. Windy at times.
Evening Temperature: 82°F
Mostly clear.
Monday, July 20th, 2026
Overnight Temperature: 76°F
Clear.
Morning Temperature: 82°F
Sunny.
Afternoon Temperature: 93°F
A mix of sun and cloud. Windy at times.
Evening Temperature: 84°F
Clear.
Tuesday, July 21st, 2026
Overnight Temperature: 79°F
Clear.
Morning Temperature: 85°F
Sunny.
Afternoon Temperature: 96°F
Sunny. Windy at times.
Evening Temperature: 86°F
Clear.
Wednesday, July 22nd, 2026
Overnight Temperature: 81°F
Clear.
Morning Temperature: 88°F
Mostly sunny.
Afternoon Temperature: 100°F
Mostly sunny. Windy at times.
Evening Temperature: 86°F
Mostly clear with a slight chance of showers.
Thursday, July 23rd, 2026
Overnight Temperature: 82°F
Mostly clear.
Morning Temperature: 87°F
Sunny.
Afternoon Temperature: 95°F
A mix of sun and cloud. Windy at times.
Evening Temperature: 85°F
Mostly clear with a slight chance of showers. Windy at times.
Friday, July 24th, 2026
Overnight Temperature: 79°F
Clear.
Morning Temperature: 84°F
Mostly sunny.
Afternoon Temperature: 94°F
Sunny. Windy at times.
Evening Temperature: 85°F
Clear.





 

  [ Local Weather Report ]
Rancho Cucamonga, CA 
11:53 PM  72°F
 
 
Upland, CA 
11:55 PM  70°F
 
 
Chino, CA 
11:53 PM  70°F
 
 
Montclair, CA 
11:55 PM  70°F
 
 
Claremont, CA 
 
Fontana, CA 
 
Norco, CA 
11:56 PM  70°F
 
 
Pomona, CA 
 
La Verne Bracket, CA 
 
La Verne, CA 

 
This WeatherCity Weather Forecast for Ontario, California, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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