| NWS Forecast for: Ontario OR Issued by: National Weather Service Boise, ID Last Update: 12:30 am MDT Apr 7, 2026 | |
| Overnight: Mostly clear, with a low around 43. Calm wind. Tuesday: Sunny, with a high near 74. Light west southwest wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 22 mph. Tuesday Night: Mostly clear, with a low around 37. Northwest wind 5 to 10 mph, with gusts as high as 23 mph. Wednesday: Mostly sunny, with a high near 68. Light and variable wind. Wednesday Night: Mostly cloudy, with a low around 37. East northeast wind around 5 mph becoming calm in the evening. Thursday: Sunny, with a high near 72. Thursday Night: Partly cloudy, with a low around 42. Friday: A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 72. Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 48. Saturday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 68. Chance of precipitation is 60%. Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 45. Chance of precipitation is 60%. Sunday: A 40 percent chance of showers. Mostly cloudy, with a high near 62. Sunday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 43. Monday: A 20 percent chance of showers. Partly 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 |