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Ontario School Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  | | |  |  | | | | |
| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Partly Sunny | Chance of T-Storm | Partly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C |
| POP: 20% | POP: 50% | POP: 40% | POP: 20% | POP: 20% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 907 PM CDT Sat Aug 22 2026 
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Issued: 853 PM CDT Sat Aug 22 2026
Key Messages
- There is a 20-40% chance for showers and thunderstorms during the day Sunday into Sunday evening over central SD, expanding to northeastern SD/west central MN Sunday night while increasing to a 40-60% chance.
- There is a Marginal Risk (level 1 out of 5) of severe weather Sunday evening over much of central to northeastern SD. The main concerns will be golf ball size hail, wind gusts exceeding 60 mph, lightning, and brief heavy rainfall.
- There is a Marginal Risk (level 1 out of 5) of s...