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

Ontario International Airport (KONT)

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

Mist

63°F

17°C

Humidity 82%
Wind Speed WSW 4 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 57°F (14°C)
Visibility 5.00 mi
Last update 25 Jun 06:20 AM PDT
Extended Forecast for

Ontario CA

  • Today

    Today: Patchy fog before 11am. Otherwise, sunny, with a high near 85. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 59. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 82 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy drizzle before 11am. Mostly sunny, with a high near 77. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 77 °F

    Patchy
    Drizzle then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 76.

    High: 76 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 11am. Otherwise, sunny, with a high near 85. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 59. West wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Mostly clear, with a low around 60. West wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Patchy drizzle before 11am. Mostly sunny, with a high near 77. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 56.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Clear, with a low around 57.
Wednesday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.03°N 117.61°W (Elev. 823 ft)
Last Update:
12:17 am PDT Jun 25, 2026
Forecast Valid:
6am PDT Jun 25, 2026-6pm PDT Jul 1, 2026
 
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