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

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 >

Hazardous Weather Conditions

Current conditions at

Ontario Municipal Airport (KONO)

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

Clear

82°F

28°C

Humidity 37%
Wind Speed N 0 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 17 Aug 08:05 PM MDT
Extended Forecast for

2 Miles SSW Weiser ID

Flash Flood Watch until August 18, 12:00am
Click here for hazard details and duration
Flash Flood Watch
  •  
    Flash Flood Watch until August 18, 12:00am

    NOW until 12:00am Mon

    Flash Flood Watch

  • Tonight

    Low: 63 °F

    Isolated
    T-storms

  • Monday

    Monday: Sunny and hot, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. Calm wind becoming north northwest around 6 mph after midnight.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. North wind around 6 mph becoming calm in the morning.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Light and variable wind becoming north northwest 5 to 8 mph in the evening.

    Low: 67 °F

    Mostly Clear

  • Wednesday

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

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

Detailed Forecast

Tonight
Isolated showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 66. Calm wind becoming north northwest around 6 mph after midnight.
Tuesday
Sunny and hot, with a high near 99. North wind around 6 mph becoming calm in the morning.
Tuesday Night
Mostly clear, with a low around 67. Light and variable wind becoming north northwest 5 to 8 mph in the evening.
Wednesday
Sunny and hot, with a high near 96.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny and hot, with a high near 96.
Thursday Night
Clear, with a low around 62.
Friday
Sunny and hot, with a high near 100.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny and hot, with a high near 101.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Sunny and hot, with a high near 99.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Weiser ID
 44.23°N 116.99°W (Elev. 2110 ft)
Last Update:
3:05 pm MDT Aug 17, 2025
Forecast Valid:
8pm MDT Aug 17, 2025-6pm MDT Aug 24, 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