Weather forecast for: Keystone SD
Last Update: 6:21 am MDT Sep 6, 2026
Today: A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 91. Calm wind becoming south 5 to 7 mph in the morning. Winds could gust as high as 21 mph.
Tonight: A 30 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 68. Southeast wind around 6 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Labor Day: Cloudy through mid morning, then gradual clearing, with a high near 87. Southwest wind 7 to 14 mph, with gusts as high as 37 mph.
Monday Night: Mostly clear, with a low around 58. Southwest wind 6 to 11 mph becoming light northwest after midnight. Winds could gust as high as 33 mph.
Tuesday: Sunny, with a high near 80. West wind 3 to 8 mph. Winds could gust as high as 28 mph.
Tuesday Night: Mostly clear, with a low around 53. North wind 3 to 7 mph. Winds could gust as high as 24 mph.
Wednesday: Sunny, with a high near 77.
Wednesday Night: Mostly clear, with a low around 56.
Thursday: Sunny, with a high near 84.
Thursday Night: Mostly clear, with a low around 59.
Friday: Sunny, with a high near 83.
Friday Night: Mostly clear, with a low around 55.
Saturday: A slight chance of showers. Mostly sunny, with a high near 72.
WeatherWorld.com
Town of Keystone, SD
