Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.
Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. Read More >
| NWS Forecast for: Ontario OR Issued by: National Weather Service Boise, ID Last Update: 12:29 pm MDT Aug 30, 2026 | |
| Tonight: Mostly clear, with a low around 51. Calm wind. Monday: Sunny and hot, with a high near 90. Light east wind. Monday Night: Partly cloudy, with a low around 58. Calm wind. Tuesday: Partly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon. Tuesday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 58. East wind around 5 mph becoming calm after midnight. Wednesday: Partly sunny, with a high near 79. Wednesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 56. Thursday: A 30 percent chance of showers. Partly sunny, with a high near 77. Thursday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 52. Friday: Mostly sunny, with a high near 79. Friday Night: Partly cloudy, with a low around 52. Saturday: Mostly sunny, with a high near 82. Saturday Night: Partly cloudy, with a low around 53. Sunday: Mostly sunny, with a high near 82. | |
| Ontario OR 44.03°N 116.97°W (Elev. 2103 ft) | |
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