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Castalia School, SD Weather Forecast
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Castalia School Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | |  |  |  | | |  |  |  | |
| Chance of Showers | Chance of Showers | Showers | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Showers | Chance of Showers | Chance of Showers | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 49°FHi: 9°C | Lo: 39°FLo: 4°C | Hi: 51°FHi: 11°C | Lo: 39°FLo: 4°C | Hi: 51°FHi: 11°C |
| POP: 20% | POP: 20% | POP: 70% | POP: 100% | POP: 100% | POP: 100% | POP: 60% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 158 AM CDT Sat Oct 31 2026 
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Issued: 1130 PM CDT Fri Oct 30 2026
Key Messages
- Showers and very isolated thunderstorms will continue tonight into Saturday morning. No severe weather expected.
- A more widespread rain returns later Sunday night into Monday night. The latest guidance suggests about a 60-90 percent chance for more than an inch of rain. Flooding is unlikely, but not zero. Additional rainfall is likely on Tuesday.
- A low confidence threat for low topped supercells Monday afternoon and evening in far southeast SD, northeast NE and northwest IA.