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

Areas of Excessive Rainfall, Severe Thunderstorms, and Extreme Heat

Heavy to excessive rainfall is expected through tonight across portions of the central Plains. Areas of intense rainfall amounts could support increasing flooding concerns. Scattered severe thunderstorms are possible across parts of the central/southern Plains today and tonight, with large hail and damaging winds the main threats. Areas of extreme heat will impact parts of the West this week. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

Lat: 44.01424°NLon: 117.00808°WElev: 2185.0ft.

Clear

94°F

34°C

Humidity 19%
Wind Speed N 4 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 10 Aug 07:53 PM MDT
Extended Forecast for

Ontario ORSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 65. North northwest wind around 6 mph becoming calm after midnight.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Light and variable wind.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. Light and variable wind.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 102. Light and variable wind.

    High: 102 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Northwest wind 3 to 6 mph.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 94.

    High: 94 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 65. North northwest wind around 6 mph becoming calm after midnight.
Monday
Sunny and hot, with a high near 100. Light and variable wind.
Monday Night
Mostly clear, with a low around 67. Light and variable wind.
Tuesday
Sunny and hot, with a high near 102. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 68. Northwest wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny and hot, with a high near 94.
Thursday Night
Mostly clear, with a low around 62.
Friday
Sunny and hot, with a high near 93.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny and hot, with a high near 91.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny and hot, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario ORSimilar City Names
 44.03°N 116.97°W (Elev. 2103 ft)
Last Update:
3:04 pm MDT Aug 10, 2025
Forecast Valid:
8pm MDT Aug 10, 2025-6pm MDT Aug 17, 2025
 
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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