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Ontario High School, OR Weather Forecast
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Ontario High School Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY |
 |  |  |  |  |  |  |  | | | | |
| Smoke | Chance of T-Storm | Chance of T-Storm | Blowing Dust | Sunny | Increasing Clouds | Partly Cloudy | Partly Cloudy | Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 100°FHi: 38°C | Lo: 71°FLo: 22°C | Hi: 97°FHi: 36°C | Lo: 65°FLo: 18°C | Hi: 92°FHi: 33°C | Lo: 63°FLo: 17°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C | Hi: 95°FHi: 35°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C |
| POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 230 AM MDT Fri Aug 21 2026 
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Issued: 630 AM MDT Fri Aug 21 2026
Key Messages
- Heat Advisory through this evening in the Treasure Valley, western Magic Valley, and Upper Weiser River Valley.
- Monsoon moisture will bring a chance of showers and thunderstorms Friday through Tuesday.
- A cold front will bring strong thunderstorms to the area on Saturday afternoon and evening.
- Thunderstorms capable of producing gusty outflow winds up to 50 mph with areas of blowing dust.
Aviation
/12Z Friday through Saturday/... Issued 624 AM MDT FRI AUG 21 2026 VFR. High density altitu...