| NWS Forecast for: Ontario OR Issued by: National Weather Service Boise, ID Last Update: 12:29 pm MDT Apr 3, 2026 | |
| Overnight: Mostly clear, with a low around 32. Calm wind. Saturday: Sunny, with a high near 66. Calm wind. Saturday Night: Mostly clear, with a low around 36. Light north wind. Sunday: Sunny, with a high near 70. Light and variable wind. Sunday Night: Mostly cloudy, with a low around 38. Light north wind. Monday: Mostly sunny, with a high near 72. Monday Night: Partly cloudy, with a low around 45. Tuesday: Mostly sunny, with a high near 72. Tuesday Night: Mostly cloudy, with a low around 40. Wednesday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 61. Wednesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 37. Thursday: Sunny, with a high near 62. Thursday Night: Mostly clear, with a low around 36. Friday: Mostly sunny, with a high near 63. | |
| Ontario OR 44.03°N 116.97°W (Elev. 2103 ft) | |
Visit your local NWS office at: https://www.weather.gov/boi |