Weather in Keystone, SD
Updated 2026-08-11 09:15 local time · ZIP codes 57751
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
81°1% rain85°0% rain88°0% rain91°1% rain93°1% rain94°1% rain93°1% rain92°1% rain90°1% rain88°0% rain82°1% rain68°4% 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 4%).
It feels like 79°F with winds near 3 mph.
68°F, 4% rain chance and 2 mph wind.
Visibility is around 6 mi; gusts may reach 14 mph.
Current temperature is 81°F, wind 3 mph, rain chance up to 4%.
UV index is 2.
Keystone weather today
Sunny and 81°F in Keystone, SD. Today's high is 94°F with a 1% rain chance. Winds are around 3 mph with gusts near 3 mph. Relative humidity is 31%, pressure is 29.84 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Keystone
Sunrise is at 05:53 AM and sunset is at 08:04 PM. Tomorrow's forecast calls for Partly Cloudy with a high near 84°F and a low near 57°F. The maximum rain chance is 57%.