Weather in Keystone, SD
Updated 2026-09-26 09:00 local time · ZIP codes 57751
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
68°2% rain72°1% rain75°1% rain75°1% rain74°1% rain
74°2% rain74°1% rain73°1% rain72°1% rain69°1% rain
63°1% rain62°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 2%).
It feels like 62°F with winds near 8 mph.
69°F, 1% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 26 mph.
Current temperature is 68°F, wind 8 mph, rain chance up to 2%.
UV index is 1.
Local weather characteristics in Keystone
South Dakota has a continental climate with hot summers, cold winters, frequent wind and strong differences between the Black Hills and the open plains.
Keystone is part of the Midwest weather region. The forecast point is near 43.90°N latitude and 103.42°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.
Keystone weather today
Sunny and 68°F in Keystone, SD. Today's high is 75°F with a 3% rain chance. Winds are around 8 mph with gusts near 12 mph. Relative humidity is 46%, pressure is 29.79 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Keystone
Sunrise is at 06:45 AM and sunset is at 06:44 PM. Tomorrow's forecast calls for Overcast with a high near 72°F and a low near 56°F. The maximum rain chance is 72%.