Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

66°F

19°C

Humidity 68%
Wind Speed WSW 3 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 18 Aug 02:05 AM MDT
Extended Forecast for

Ontario ORSimilar City Names

  • Overnight

    Overnight: Patchy smoke. Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Patchy Smoke

  • Tuesday

    Tuesday: Patchy smoke between 2pm and 4pm. Sunny and hot, with a high near 96. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 96 °F

    Patchy Smoke

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. North northwest wind 3 to 8 mph.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96. Calm wind.

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Friday Night

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

    Low: 68 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy smoke. Partly cloudy, with a low around 65. Calm wind.
Tuesday
Patchy smoke between 2pm and 4pm. Sunny and hot, with a high near 96. Calm wind becoming west northwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 65. North northwest wind 3 to 8 mph.
Wednesday
Sunny and hot, with a high near 96. Calm wind.
Wednesday Night
Mostly clear, with a low around 65. Calm wind.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Partly sunny and hot, with a high near 99.
Friday Night
Mostly cloudy, with a low around 68.
Saturday
Mostly sunny and hot, with a high near 93.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny and hot, with a high near 92.
Sunday Night
Mostly clear, with a low around 63.
Monday
Sunny and hot, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario ORSimilar City Names
 44.03°N 116.97°W (Elev. 2103 ft)
12:29 am MDT Aug 18, 2026
2am MDT Aug 18, 2026-6pm MDT Aug 24, 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