Weather World
Lake Thompson, SD Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Lake Thompson Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 | |  |  |  | |  | | |  | | |
| Showers | Rain Showers | Partly Sunny | Partly Cloudy | Chance of Showers | Partly Cloudy | Sunny | Partly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 45°FHi: 7°C | Lo: 35°FLo: 2°C | Hi: 51°FHi: 11°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 39°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C |
| POP: 100% | POP: 100% | POP: 50% | POP: 50% | POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 714 AM CDT Mon Oct 26 2026 
Lake Thompson Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Lake Thompson Weather Map
Lake Thompson Quick Facts
Lake Thompson Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 645 AM CDT Mon Oct 26 2026
Key Messages
- Rain is likely throughout the day for most of the area to start the new work week. Amounts through tonight will range from 0.5 to 1.5". Locally higher amounts remain possible in a corridor between the James River and MN/IA Highway 60.
- An active pattern aloft will lead to additional rain chances on Wednesday and potentially over the weekend. Monitor your local forecast if you have any outdoor plans
- Near to slightly above normal temperatures will return from Wednesday onwards with dail...