Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

79°F

26°C

Humidity 43%
Wind Speed WSW 3 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 17 Aug 12:53 PM MDT
Extended Forecast for

2 Miles S Ontario Municipal OR

Flash Flood Watch August 17, 03:00pm until August 18, 12:00am
Click here for hazard details and duration
Flash Flood Watch
  • This Afternoon

    This Afternoon: Sunny, with a high near 89. Calm wind.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Isolated showers and thunderstorms before midnight.  Mostly cloudy, then becoming mostly clear toward daybreak, with a low around 63. Calm wind becoming southwest around 5 mph after midnight.  Chance of precipitation is 20%.

    Low: 63 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 94. Southwest wind 3 to 5 mph.

    High: 94 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. Calm wind becoming west northwest 5 to 7 mph after midnight.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. West wind 3 to 6 mph.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 94.

    High: 94 °F

    Hot

Detailed Forecast

This Afternoon
Sunny, with a high near 89. Calm wind.
Tonight
Isolated showers and thunderstorms before midnight. Mostly cloudy, then becoming mostly clear toward daybreak, with a low around 63. Calm wind becoming southwest around 5 mph after midnight. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 94. Southwest wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 63. Calm wind becoming west northwest 5 to 7 mph after midnight.
Tuesday
Sunny and hot, with a high near 98. West wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny and hot, with a high near 95.
Wednesday Night
Clear, with a low around 62.
Thursday
Sunny and hot, with a high near 94.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny and hot, with a high near 98.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny and hot, with a high near 98.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Ontario Municipal OR
 44.01°N 117°W (Elev. 2129 ft)
8:04 am MDT Aug 17, 2025
1pm MDT Aug 17, 2025-6pm MDT Aug 23, 2025
 
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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