Weather in Union Center, SD
Updated 2026-09-26 10:45 local time · ZIP codes 57787
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
70°3% rain75°1% rain77°1% rain78°1% rain79°1% rain79°0% rain78°1% rain75°0% rain
71°1% rain69°1% rain68°1% rain67°1% 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 1%).
It feels like 64°F with winds near 13 mph.
71°F, 1% rain chance and 8 mph wind.
Visibility is around 6 mi; gusts may reach 22 mph.
Current temperature is 70°F, wind 13 mph, rain chance up to 1%.
UV index is 2.
Local weather characteristics in Union Center
South Dakota has a continental climate with hot summers, cold winters, frequent wind and strong differences between the Black Hills and the open plains.
Union Center is part of the Midwest weather region. The forecast point is near 44.66°N latitude and 102.81°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.
Union Center weather today
Sunny and 70°F in Union Center, SD. Today's high is 79°F with a 4% rain chance. Winds are around 13 mph with gusts near 15 mph. Relative humidity is 58%, pressure is 29.80 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Union Center
Sunrise is at 06:43 AM and sunset is at 06:41 PM. Tomorrow's forecast calls for Overcast with a high near 73°F and a low near 59°F. The maximum rain chance is 80%.