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

57°F

14°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 03 Jan 08:35 PM PST
Extended Forecast for

Ontario CA

  • Tonight

    Tonight: Showers likely. Mostly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. High near 62. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Low around 52. Southwest wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Showers then
    Chance
    Showers

  • Monday

    Monday: A slight chance of showers before 4pm. Partly sunny, with a high near 61. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 61 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers after 10pm. Mostly cloudy, with a low around 48. Calm wind. Chance of precipitation is 20%.

    Low: 48 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, mainly before 4pm. Partly sunny, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers before 10pm. Partly cloudy, with a low around 46. Chance of precipitation is 20%.

    Low: 46 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely. Mostly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. High near 62. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Low around 52. Southwest wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A slight chance of showers before 4pm. Partly sunny, with a high near 61. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
A slight chance of showers after 10pm. Mostly cloudy, with a low around 48. Calm wind. Chance of precipitation is 20%.
Tuesday
A chance of showers, mainly before 4pm. Partly sunny, with a high near 62. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers before 10pm. Partly cloudy, with a low around 46. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 61.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
12:15 pm PST Jan 3, 2026
Forecast Valid:
8pm PST Jan 3, 2026-6pm PST Jan 10, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation