Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

64°F

18°C

Humidity 39%
Wind Speed WSW 8 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 19 Aug 06:20 AM MDT
Extended Forecast for

4 Miles WSW Ontario Municipal OR

Heat Advisory August 20, 12:00pm until August 21, 09:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Sunny and hot, with a high near 95. West wind 5 to 8 mph becoming calm  in the afternoon.

    High: 95 °F

    Hot

  • Tonight

    Tonight: Patchy smoke after 2am. Mostly clear, with a low around 63. Light and variable wind becoming north 5 to 7 mph after midnight.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Smoke

  • Thursday

    Thursday: Patchy smoke before noon. Sunny and hot, with a high near 99. West wind around 6 mph becoming calm.

    High: 99 °F

    Patchy Smoke
    then Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65. Northwest wind 5 to 9 mph.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny and hot, with a high near 101. Northwest wind around 5 mph becoming calm  in the morning.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 94.

    High: 94 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 90.

    High: 90 °F

    Hot

Detailed Forecast

Today
Sunny and hot, with a high near 95. West wind 5 to 8 mph becoming calm in the afternoon.
Tonight
Patchy smoke after 2am. Mostly clear, with a low around 63. Light and variable wind becoming north 5 to 7 mph after midnight.
Thursday
Patchy smoke before noon. Sunny and hot, with a high near 99. West wind around 6 mph becoming calm.
Thursday Night
Partly cloudy, with a low around 65. Northwest wind 5 to 9 mph.
Friday
Partly sunny and hot, with a high near 101. Northwest wind around 5 mph becoming calm in the morning.
Friday Night
Mostly cloudy, with a low around 68.
Saturday
Mostly sunny and hot, with a high near 94.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny and hot, with a high near 90.
Sunday Night
Mostly clear, with a low around 61.
Monday
Mostly sunny and hot, with a high near 92.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny and hot, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Ontario Municipal OR
 44°N 117.09°W (Elev. 2182 ft)
3:53 am MDT Aug 19, 2026
6am MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database