National Weather Service

News Headlines

SCN26-34: Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Alaska Region, Eastern Region, and Western Region Offices: Effective May 6, 2026

Current conditions at

Ontario Municipal Airport (KONO)

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

Rain

45°F

7°C

Humidity	87%
Wind Speed	S 11 MPH
Barometer	29.86 in (1011.18 mb)
Dewpoint	41°F (5°C)
Visibility	7.00 mi
Wind Chill	39°F (4°C)
Last update	13 Apr 01:20 AM MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Oregon Lower Treasure Valley

Today

Rain showers, then a chance of rain showers with a slight chance of thunderstorms this afternoon. Chance of rain 90 percent. Highs 52 to 57. West winds 10 to 15 mph with gusts to 25 mph.

Tonight

Mostly cloudy. A slight chance of rain showers and thunderstorms in the evening. Patchy fog in the evening. Areas of fog after midnight. Chance of rain 20 percent. Lows 35 to 40. Northwest winds around 10 mph.

Tuesday

Patchy fog in the morning. Mostly sunny. Highs 58 to 63. West winds around 10 mph.

Tuesday Night

Mostly cloudy. A chance of rain showers, mainly after midnight. Chance of rain 50 percent. Lows 41 to 46. Southwest winds around 10 mph.

Wednesday

Rain showers. A slight chance of thunderstorms in the afternoon. Chance of rain near 100 percent. Highs 53 to 58. Breezy. South winds 10 to 20 mph. Gusts to 30 mph in the afternoon.

Wednesday Night

Rain showers with a slight chance of thunderstorms in the evening, then a chance of rain and snow showers after midnight. Chance of precipitation 90 percent. Little snow accumulation expected. Colder with lows 29 to 34. Breezy.

Thursday

Partly cloudy. A slight chance of snow showers in the morning, then a chance of rain and snow showers, with a slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs 45 to 50. Breezy.

Thursday Night Through Friday Night

Mostly clear. Lows 27 to 35. Highs 52 to 57.

Saturday

Mostly sunny. Highs 59 to 64.

Saturday Night

Decreasing clouds. Lows 37 to 42.

Sunday

Partly cloudy with a 20 percent chance of rain showers. Highs 63 to 68.