Weather in Gann Valley, SD
Updated 2026-09-26 09:00 local time · ZIP codes 57341
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
58°33% rain
59°28% rain62°28% rain64°26% rain67°17% rain70°18% rain68°19% rain68°22% rain67°22% rain67°23% rain64°29% rain
67°14% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
There is a moderate rain chance, peaking near 33%.
It feels like 53°F with winds near 12 mph.
70°F, 18% rain chance and 12 mph wind.
Visibility is around 6 mi; gusts may reach 24 mph.
Current temperature is 58°F, wind 12 mph, rain chance up to 33%.
UV index is 0.
Local weather characteristics in Gann Valley
South Dakota has a continental climate with hot summers, cold winters, frequent wind and strong differences between the Black Hills and the open plains.
Gann Valley is part of the Midwest weather region. The forecast point is near 44.09°N latitude and 99.07°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.
Gann Valley weather today
Overcast and 58°F in Gann Valley, SD. Today's high is 70°F with a 41% rain chance. Winds are around 12 mph with gusts near 24 mph. Relative humidity is 95%, pressure is 29.86 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Gann Valley
Sunrise is at 07:28 AM and sunset is at 07:26 PM. Tomorrow's forecast calls for Overcast with a high near 72°F and a low near 59°F. The maximum rain chance is 21%.