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

Air Quality Concerns; Fire Weather; Extreme Heat; Severe Thunderstorms and Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin and Rockies. Heavy rainfall and flash flooding possible for the Southeast through today. Strong to severe thunderstorms for the Southern Plains with severe wind gusts and large hail possible. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Partly Cloudy

82°F

28°C

Humidity 34%
Wind Speed E 8 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 04 Aug 03:05 PM MDT
Extended Forecast for

Ontario ORSimilar City Names

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. West northwest wind around 8 mph.

    High: 85 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 59. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 90. Light and variable wind.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. Light north northwest wind.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 91. West northwest wind around 6 mph.

    High: 91 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. West northwest wind around 8 mph.
Tonight
Mostly clear, with a low around 59. Northwest wind 5 to 8 mph becoming calm after midnight.
Tuesday
Sunny and hot, with a high near 90. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 65. Light north northwest wind.
Wednesday
Mostly sunny and hot, with a high near 91. West northwest wind around 6 mph.
Wednesday Night
Mostly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny and hot, with a high near 91.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny and hot, with a high near 94.
Sunday Night
Mostly clear, with a low around 66.
Monday
Sunny and hot, with a high near 97.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario ORSimilar City Names
 44.03°N 116.97°W (Elev. 2103 ft)
Last Update:
3:04 pm MDT Aug 4, 2025
Forecast Valid:
3pm MDT Aug 4, 2025-6pm MDT Aug 11, 2025
 
Forecast Discussion
 
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Additional Resources

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