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

95°F

35°C

Humidity 13%
Wind Speed E 3 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 19 Aug 02:35 PM MDT
Extended Forecast for

4 Miles W Ontario Municipal OR

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

    This Afternoon: Sunny and hot, with a high near 96. Southeast wind around 5 mph becoming calm.

    High: 96 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 63. Calm wind becoming north northwest around 6 mph after midnight.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. West wind around 5 mph becoming calm.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 66. Calm wind becoming north northwest 5 to 8 mph after midnight.

    Low: 66 °F

    Mostly Cloudy

  • Friday

    Friday: Patchy smoke between 7am and noon. Partly sunny and hot, with a high near 98. West northwest wind around 5 mph becoming calm  in the afternoon.

    High: 98 °F

    Patchy Smoke
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny and hot, with a high near 95.

    High: 95 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 96. Southeast wind around 5 mph becoming calm.
Tonight
Mostly clear, with a low around 63. Calm wind becoming north northwest around 6 mph after midnight.
Thursday
Sunny and hot, with a high near 98. West wind around 5 mph becoming calm.
Thursday Night
Mostly cloudy, with a low around 66. Calm wind becoming north northwest 5 to 8 mph after midnight.
Friday
Patchy smoke between 7am and noon. Partly sunny and hot, with a high near 98. West northwest wind around 5 mph becoming calm in the afternoon.
Friday Night
Mostly cloudy, with a low around 70.
Saturday
Partly sunny and hot, with a high near 95.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 60.
Monday
Mostly sunny and hot, with a high near 91.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny and hot, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Ontario Municipal OR
 44.02°N 117.09°W (Elev. 2333 ft)
12:32 pm MDT Aug 19, 2026
2pm MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
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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