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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Ontario Municipal Airport (KONO)

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

haze

93°F

34°C

Humidity 24%
Wind Speed N 0 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 52°F (11°C)
Visibility 4.00 mi
Heat Index90°F (32°C)
Last update 29 Jul 05:05 PM MDT
Extended Forecast for

Ontario Municipal OR

  • Tonight

    Tonight: Areas of smoke. Mostly clear, with a low around 63. Light and variable wind becoming north northwest 8 to 13 mph in the evening.

    Low: 63 °F

    Areas Smoke

  • Thursday

    Thursday: Patchy smoke. Mostly sunny and hot, with a high near 99. Light and variable wind.

    High: 99 °F

    Patchy Smoke

  • Thursday Night

    Thursday Night: Areas of smoke. Mostly clear, with a low around 63. Calm wind becoming north northwest 5 to 8 mph after midnight.

    Low: 63 °F

    Areas Smoke

  • Friday

    Friday: Areas of smoke. Sunny and hot, with a high near 101. West northwest wind around 5 mph becoming calm in the morning.

    High: 101 °F

    Areas Smoke

  • Friday Night

    Friday Night: Patchy smoke. Clear, with a low around 63. Light and variable wind.

    Low: 63 °F

    Patchy Smoke

  • Saturday

    Saturday: Areas of smoke before noon. Sunny and hot, with a high near 99.

    High: 99 °F

    Areas Smoke
    then Sunny

  • Saturday Night

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

    Low: 59 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 88. Breezy.

    High: 88 °F

    Sunny and
    Breezy then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 56. Breezy.

    Low: 56 °F

    Clear and
    Breezy then
    Clear

Detailed Forecast

Tonight
Areas of smoke. Mostly clear, with a low around 63. Light and variable wind becoming north northwest 8 to 13 mph in the evening.
Thursday
Patchy smoke. Mostly sunny and hot, with a high near 99. Light and variable wind.
Thursday Night
Areas of smoke. Mostly clear, with a low around 63. Calm wind becoming north northwest 5 to 8 mph after midnight.
Friday
Areas of smoke. Sunny and hot, with a high near 101. West northwest wind around 5 mph becoming calm in the morning.
Friday Night
Patchy smoke. Clear, with a low around 63. Light and variable wind.
Saturday
Areas of smoke before noon. Sunny and hot, with a high near 99.
Saturday Night
Mostly clear, with a low around 59. Breezy.
Sunday
Sunny, with a high near 88. Breezy.
Sunday Night
Clear, with a low around 56. Breezy.
Monday
Sunny, with a high near 88.
Monday Night
Clear, with a low around 56.
Tuesday
Sunny and hot, with a high near 94.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny and hot, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario Municipal OR
 44.03°N 117°W (Elev. 2139 ft)
Last Update:
12:28 pm MDT Jul 29, 2026
Forecast Valid:
5pm MDT Jul 29, 2026-6pm MDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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