| NWS Forecast for: Ontario OR Issued by: National Weather Service Boise, ID Last Update: 12:29 am MDT Oct 6, 2026 | |
| Overnight: Clear, with a low around 51. Calm wind. Tuesday: Sunny, with a high near 86. Calm wind. Tuesday Night: Clear, with a low around 49. Calm wind. Wednesday: Sunny, with a high near 85. Calm wind. Wednesday Night: Clear, with a low around 49. Calm wind. Thursday: Sunny, with a high near 85. Thursday Night: Clear, with a low around 50. Friday: Sunny, with a high near 85. Friday Night: Partly cloudy, with a low around 48. Saturday: Mostly sunny, with a high near 69. Saturday Night: A 20 percent chance of showers. Mostly clear, with a low around 41. Sunday: A 20 percent chance of showers. Mostly sunny, with a high near 63. Sunday Night: A 20 percent chance of showers. Partly cloudy, with a low around 37. Columbus Day: Mostly sunny, with a high near 61. | |
| Ontario OR 44.03°N 116.97°W (Elev. 2103 ft) | |
Visit your local NWS office at: https://www.weather.gov/boi |