Fort Thompson, SD Weather Forecast
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Fort Thompson Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
| Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C |
| POP: 50% | POP: 50% | POP: 50% | POP: 80% | POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 742 AM CDT Thu Sep 24 2026 

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Issued: 648 AM CDT Thu Sep 24 2026
Key Messages
- Scattered rain showers and weak thunderstorms will continue this morning with the last of the rain exiting the region by the midday. There is a 60-95% chance to see a quarter of an inch of rain or more along and east of the James River, with the highest chance along and east of I29.
- Another round of rain arrives Friday afternoon into Saturday morning. There is a 40-60% chance to see a quarter of an inch or more through Saturday morning.
- Expect temperatures near normal for the next fe...
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