Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Hazardous Weather Conditions

Current conditions at

Ontario Municipal Airport (KONO)

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

haze

82°F

28°C

Humidity 26%
Wind Speed NW 17 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 45°F (7°C)
Visibility 4.00 mi
Heat Index80°F (27°C)
Last update 28 Jul 10:35 PM MDT
Extended Forecast for

Ontario OR

  • Tonight

    Tonight: Widespread smoke, mainly before 5am. Partly cloudy, with a low around 65. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Smoke

  • Wednesday

    Wednesday: Areas of smoke. Mostly sunny and hot, with a high near 98. West wind around 6 mph becoming calm  in the afternoon.

    High: 98 °F

    Areas Smoke

  • Wednesday Night

    Wednesday Night: Widespread smoke, mainly after 11pm. Partly cloudy, with a low around 65. Light and variable wind.

    Low: 65 °F

    Smoke

  • Thursday

    Thursday: Areas of smoke. Sunny and hot, with a high near 97. Calm wind.

    High: 97 °F

    Areas Smoke

  • Thursday Night

    Thursday Night: Areas of smoke. Clear, with a low around 66. Calm wind becoming north northwest around 6 mph after midnight.

    Low: 66 °F

    Areas Smoke

  • Friday

    Friday: Areas of smoke. Sunny and hot, with a high near 101.

    High: 101 °F

    Areas Smoke

  • Friday Night

    Friday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Saturday

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

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. Breezy.

    Low: 59 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

Detailed Forecast

Tonight
Widespread smoke, mainly before 5am. Partly cloudy, with a low around 65. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.
Wednesday
Areas of smoke. Mostly sunny and hot, with a high near 98. West wind around 6 mph becoming calm in the afternoon.
Wednesday Night
Widespread smoke, mainly after 11pm. Partly cloudy, with a low around 65. Light and variable wind.
Thursday
Areas of smoke. Sunny and hot, with a high near 97. Calm wind.
Thursday Night
Areas of smoke. Clear, with a low around 66. Calm wind becoming north northwest around 6 mph after midnight.
Friday
Areas of smoke. Sunny and hot, with a high near 101.
Friday Night
Clear, with a low around 65.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Mostly clear, with a low around 59. Breezy.
Sunday
Sunny, with a high near 89.
Sunday Night
Clear, with a low around 55.
Monday
Sunny, with a high near 89.
Monday Night
Clear, with a low around 56.
Tuesday
Sunny and hot, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario OR
 44.03°N 116.97°W (Elev. 2103 ft)
12:29 pm MDT Jul 28, 2026
10pm MDT Jul 28, 2026-6pm MDT Aug 4, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database