Weather in Gann Valley, SD
Updated 2026-08-11 12:00 local time · ZIP codes 57341
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
77°7% rain
86°6% rain87°5% rain88°4% rain89°3% rain89°2% rain88°2% rain87°3% rain84°3% rain
81°5% rain78°7% rain77°8% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 8%).
It feels like 80°F with winds near 10 mph.
84°F, 3% rain chance and 9 mph wind.
Visibility is around 10 mi; gusts may reach 26 mph.
Current temperature is 77°F, wind 10 mph, rain chance up to 8%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Gann Valley weather today
Overcast and 77°F in Gann Valley, SD. Today's high is 89°F with a 17% rain chance. Winds are around 10 mph with gusts near 12 mph. Relative humidity is 100%, pressure is 29.92 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Gann Valley
Sunrise is at 06:35 AM and sunset is at 08:46 PM. Tomorrow's forecast calls for Partly Cloudy with a high near 92°F and a low near 67°F. The maximum rain chance is 57%.