Weather in Fort Thompson, SD
Updated 2026-09-26 11:00 local time · ZIP codes 57339
Patchy rain nearby
No government weather alerts were returned for this location at the latest update.
Next hours
64°28% rain65°25% rain67°21% rain
69°18% rain69°18% rain70°16% rain
71°5% rain71°5% rain67°22% rain
68°14% rain
69°19% rain68°20% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 28%).
It feels like 60°F with winds near 13 mph.
71°F, 5% rain chance and 9 mph wind.
Visibility is around 6 mi; gusts may reach 19 mph.
Current temperature is 64°F, wind 13 mph, rain chance up to 28%.
UV index is 2.
Local weather characteristics in Fort Thompson
South Dakota has a continental climate with hot summers, cold winters, frequent wind and strong differences between the Black Hills and the open plains.
Fort Thompson is part of the Midwest weather region. The forecast point is near 44.07°N latitude and 99.44°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Fort Thompson weather today
Patchy rain nearby and 64°F in Fort Thompson, SD. Today's high is 71°F with a 34% rain chance. Winds are around 13 mph with gusts near 18 mph. Relative humidity is 84%, pressure is 29.85 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Fort Thompson
Sunrise is at 07:29 AM and sunset is at 07:28 PM. Tomorrow's forecast calls for Mist with a high near 73°F and a low near 59°F. The maximum rain chance is 19%.