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

Air Quality Concerns; Fire Weather; Extreme Heat; 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. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

73°F

23°C

Humidity 39%
Wind Speed W 10 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 03 Aug 11:53 PM MDT
Extended Forecast for

Ontario OR

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. West northwest wind around 7 mph.

    Low: 64 °F

    Mostly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87. West northwest wind 5 to 9 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. West wind 5 to 8 mph becoming calm after midnight.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 91. Light west wind.

    High: 91 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. Light north northwest wind.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 92.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. West northwest wind around 7 mph.
Monday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87. West northwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 58. West wind 5 to 8 mph becoming calm after midnight.
Tuesday
Sunny and hot, with a high near 91. Light west wind.
Tuesday Night
Mostly clear, with a low around 62. Light north northwest wind.
Wednesday
Mostly sunny and hot, with a high near 92.
Wednesday Night
Mostly cloudy, with a low around 64.
Thursday
Mostly sunny and hot, with a high near 90.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny and hot, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario OR
 44.01°N 116.94°W (Elev. 2100 ft)
Last Update:
3:12 pm MDT Aug 3, 2025
Forecast Valid:
12am MDT Aug 4, 2025-6pm MDT Aug 10, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation