Areas of Excessive Rainfall; Watching for Tropical Cyclone Development in the Atlantic

Heavy to excessive rainfall Wednesday may bring areas of flash and urban flooding over portions of the Ohio and Tennessee Valleys. In Arizona and New Mexico, heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding Thursday into Saturday. Two tropical waves in the Atlantic are being monitored for tropical cyclone formation within the next few days. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

Lat: 44.01424° N Lon: 117.00808° W Elev: 2185.0 ft.

Clear

45°F

7°C

Humidity 70%
Wind Speed SW 5 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 24 Sep 05:15 AM MDT
Detailed forecast for

Oregon Lower Treasure Valley

Today
Sunny. Highs 80 to 85. Light winds.
Tonight
Mostly clear. Lows 46 to 53. Light winds.
Thursday
Sunny. Highs 82 to 87. Light winds.
Thursday Night
Mostly clear. Lows 49 to 54. Light winds in the evening, becoming northwest 10 to 15 mph after midnight.
Friday
Sunny. Highs 76 to 81. Northwest winds 10 to 15 mph.
Friday Night And Saturday
Clear. Lows 44 to 50. Highs 77 to 82.
Saturday Night
Mostly clear. Lows 47 to 54.
Sunday
Mostly sunny. Highs 79 to 84.
Sunday Night
Increasing clouds. A 20 percent chance of showers. Lows 54 to 59.
Monday
Partly cloudy. A chance of showers, mainly in the afternoon. Chance of rain 30 percent. Highs 72 to 77.
Monday Night
Mostly cloudy with a 40 percent chance of showers. Lows 50 to 55.
Tuesday
Decreasing clouds. Areas of fog in the morning. A 40 percent chance of showers. Highs 68 to 73.



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307 AM MDT Wed Sep 24 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database