Ontario, California Weather
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Weather Forecast for Ontario, California : San Bernardino County
Issued: 1:26 am PDT Aug 16, 2025 Latitude: 34.0633443 Longitude: -117.6508876 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
Sunny on This Afternoon Patchy Fog on Tonight Morning Fog on Sunday Sunny on Monday Sunny on Tuesday Sunny on Wednesday Sunny on Thursday Sunny on Friday
High: 83°F Low: 62°F High: 86°F High: 90°F High: 90°F High: 93°F High: 97°F High: 98°F
Low: 62°F Low: 63°F Low: 65°F Low: 69°F Low: 71°F  
Sunny Patchy Fog Morning Fog Sunny Sunny Sunny Sunny Sunny
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Current Conditions at
ONTARIO - (KONT)
72°
Partly Cloudy
as of 11:14 AM PDST
Rel. Humidity: 64%
Dew Point: 59°F
Visibility: 7 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
6 MPH
Cloud Level(s): Scattered at 1900ft
Current Conditions at
CHINO - (KCNO)
75°
Mostly Cloudy
as of 11:25 AM PDST
Rel. Humidity: 60%
Dew Point: 61°F
Visibility: 8 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
6 MPH
Cloud Level(s): Broken at 2100ft
Current Conditions at
RIVERSIDE - (KRAL)
72°
Partly Cloudy
as of 11:00 AM PDST
Rel. Humidity: 64%
Dew Point: 59°F
Visibility: 8 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
3 MPH
Cloud Level(s): Scattered at 1800ft
Sunny on This Afternoon This Afternoon... Sunny, with a high near 83. West wind 5 to 10 mph, with gusts as high as 20 mph.
Patchy Fog on Tonight Tonight... Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 62. West wind 5 to 10 mph, with gusts as high as 20 mph.
Morning Fog on Sunday Sunday... Patchy fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 62. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunny on Monday Monday... Sunny, with a high near 90. Light southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Clear on Monday Night Monday Night... Clear, with a low around 63.
Sunny on Tuesday Tuesday... Sunny, with a high near 90.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 65.
Sunny on Wednesday Wednesday... Sunny, with a high near 93.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 69.
Sunny on Thursday Thursday... Sunny, with a high near 97.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 71.
Sunny on Friday Friday... Sunny, with a high near 98.
Sun Almanac for Ontario, California
Sunrise: 06:13 AM
Sunset: 7:36 PM
Civil Sunrise:05:47 AM
Civil Sunset: 8:03 PM
Nautical Sunrise: 05:15 AM
Nautical Sunset: 8:34 PM
Astro Sunrise: 04:43 AM
Astro Sunset: 9:07 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.