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Mountain School Weather Forecast
| REST OF TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
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| Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Sunny | Chance of T-Storm | Chance of Showers | Mostly Cloudy |
| Hi: 65°FHi: 18°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 50°FLo: 10°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C |
| POP: 20% | POP: 50% | POP: 40% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1107 AM CDT Sat Sep 19 2026 
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Issued: 1002 AM CDT Sat Sep 19 2026
Key Messages
- The Prairie Coteau and I-29 corridor will see the low stratus and patchy fog continue into the afternoon.
- Light showers will be possible this afternoon across central SD before more widespread steadier showers move in tonight and Sunday as far east at the James Valley before tapering off to the south on Monday.
- Temperatures will remain below seasonal normals the next several days before returning to near normal readings the latter half of next week.
Discussion
... Issued at 227 AM CDT ...