National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Ontario International Airport (KONT)

Lat: 34.05316°NLon: 117.57685°WElev: 906.0ft.

Partly Cloudy

77°F

25°C

Humidity 38%
Wind Speed WSW 3 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 18 Aug 11:53 PM PDT
Extended Forecast for

2 Miles SSE Ontario CA

Heat Advisory August 19, 10:00am until August 20, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 102. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 102 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 100. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 100 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 70. West wind 5 to 10 mph.

    Low: 70 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 99.

    High: 99 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 102. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 100. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 70. West wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 99.
Friday Night
Mostly clear, with a low around 69.
Saturday
Sunny, with a high near 97.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 69.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Ontario CA
 34.03°N 117.58°W (Elev. 853 ft)
Last Update:
4:29 pm PDT Aug 18, 2026
Forecast Valid:
12am PDT Aug 19, 2026-6pm PDT Aug 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation