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.

Overcast

61°F

16°C

Humidity 77%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 8.00 mi
Last update 24 May 07:00 AM PDT
Extended Forecast for

Ontario CA

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 79. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 79 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Increasing clouds, with a low around 56. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Memorial Day

    Memorial Day: Cloudy through mid morning, then gradual clearing, with a high near 77. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 77 °F

    Gradual
    Clearing

  • Monday Night

    Monday Night: Patchy drizzle after 11pm. Increasing clouds, with a low around 55. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Patchy
    Drizzle

  • Tuesday

    Tuesday: Patchy drizzle before 11am. Cloudy through mid morning, then gradual clearing, with a high near 72. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Patchy
    Drizzle then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Patchy drizzle after 11pm. Increasing clouds, with a low around 54.

    Low: 54 °F

    Patchy
    Drizzle

  • Wednesday

    Wednesday: Patchy drizzle before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 71.

    High: 71 °F

    Patchy
    Drizzle then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 79. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Increasing clouds, with a low around 56. West wind 5 to 15 mph, with gusts as high as 20 mph.
Memorial Day
Cloudy through mid morning, then gradual clearing, with a high near 77. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Patchy drizzle after 11pm. Increasing clouds, with a low around 55. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Patchy drizzle before 11am. Cloudy through mid morning, then gradual clearing, with a high near 72. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Patchy drizzle after 11pm. Increasing clouds, with a low around 54.
Wednesday
Patchy drizzle before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 55.
Saturday
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:
2:02 am PDT May 24, 2026
Forecast Valid:
7am PDT May 24, 2026-6pm PDT May 30, 2026
 
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