| NWS Forecast for: Ontario OR Issued by: National Weather Service Boise, ID Last Update: 12:29 pm MDT Mar 28, 2026 | |
| This Afternoon: Partly sunny, with a high near 69. Light and variable wind. Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. East northeast wind around 6 mph becoming west southwest after midnight. Sunday: Mostly sunny, with a high near 72. Calm wind becoming south southwest 5 to 7 mph in the afternoon. Sunday Night: Mostly cloudy, with a low around 40. West southwest wind 7 to 11 mph becoming northwest after midnight. Monday: A slight chance of rain and snow showers before noon. Mostly cloudy, with a high near 55. Northwest wind 11 to 16 mph. Chance of precipitation is 20%. Monday Night: Mostly clear, with a low around 28. Tuesday: Sunny, with a high near 61. Tuesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 39. Wednesday: Showers likely, mainly after noon. Mostly cloudy, with a high near 61. Chance of precipitation is 60%. Wednesday Night: Showers. Low around 38. Chance of precipitation is 90%. Thursday: Showers likely. Mostly cloudy, with a high near 54. Chance of precipitation is 60%. Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 31. Friday: Sunny, with a high near 57. | |
| Ontario OR 44.03°N 116.97°W (Elev. 2103 ft) | |
Visit your local NWS office at: https://www.weather.gov/boi |