Weather WorldLegion Lake, SD 7-Day Night Weather Forecast
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Legion Lake, SD Weather Forecast
Legion Lake, SD Weather Forecast Date: 637 AM MDT Sat Aug 22 2026
The area/counties/county of: Central Black Hills, including the cities of: Hill City, Mt Rushmore, Johnson Siding, Keystone, Rockerville, Hisega, Pactola Reservoir, Custer, Jewel Cave, and Custer State Park.or toggle through each period.
Today... Partly cloudy. Highs in the upper 70s. East winds 5 to 10 mph with gusts up to 25 mph.
Tonight... Mostly cloudy with a chance of showers. A chance of thunderstorms in the evening, then a slight chance of thunderstorms after midnight. Lows in the upper 50s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40%.
Sunday... Mostly sunny in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Southwest winds 5 to 10 mph, becoming northwest with gusts up to 20 mph in the afternoon. Chance of rain 50%.
Sunday Night... Mostly clear. A chance of showers and thunderstorms in the evening. Lows in the lower 60s. Northwest winds 5 to 10 mph. Chance of rain 30%.
Monday... Sunny in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. North winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 50%.
Monday Night... Partly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the upper 50s. Chance of rain 40%.
Tuesday... Partly cloudy. A slight chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 60%.
Tuesday Night... Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 50s. Chance of rain 20%.
Wednesday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40%.
Wednesday Night... Mostly clear with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 50s. Chance of rain 20%.
Thursday... Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 20%.
Thursday Night... Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 50s. Chance of rain 20%.
POP = Probability of Precipitation
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