Weather in Keystone, South Dakota
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 04:19 PM ET · Refreshes every hour
81°F
Clear sky
Feels like 75°F
14%
Humidity
12 mph
Wind Speed
About Weather in Keystone
Keystone is located in South Dakota (coordinates: 43.894939°N, 103.426809°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.