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Chester, SD Weather Forecast
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| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 | |  |  |  | | |  |  | |  | |
| Patchy Fog | Patchy Fog | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Showers | Mostly Cloudy |
| Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 60°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C |
| POP: 20% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 739 PM CDT Fri Sep 18 2026 
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Issued: 809 PM CDT Fri Sep 18 2026
Key Messages
- Isolated thunderstorms over northeast Nebraska, northwest Iowa, and southwest Minnesota will continue to push northeast. It remains possible a storm could become strong producing marginally severe hail, brief heavy rain, and wind gusts to 55-60 mph.
- Fog has begun to form and will continue into Saturday morning. Patchy dense fog is possible along rivers, streams, valleys, and low areas. Fog will be slow to burn off, and may linger into late Saturday morning to early afternoon.
- Below n...