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Bismark Lake, SD Weather Forecast
Bismark Lake, SD Weather Forecast Date: 417 PM MDT Fri Sep 04 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.
Late This Afternoon... Sunny. Near steady temperature in the mid 80s. South winds 5 to 10 mph with gusts up to 30 mph.
Tonight... Mostly clear. Lows in the lower 60s. Southwest winds 5 to 10 mph. Gusts up to 25 mph in the evening.
Saturday... Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. West winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 20%.
Saturday Night... Partly cloudy. Lows in the mid 60s. Southwest winds 5 to 10 mph.
Sunday... Mostly sunny in the morning, then partly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. West winds around 5 mph, becoming south with gusts up to 20 mph in the afternoon. Chance of rain 30%.
Sunday Night... Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 60s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50%.
Labor Day... Partly cloudy. Highs in the lower 80s.
Monday Night... Partly cloudy in the evening, then clearing. Lows in the mid 50s.
Tuesday... Sunny. Highs in the mid 70s.
Tuesday Night... Mostly clear. Lows in the lower 50s.
Wednesday... Mostly sunny. Highs in the mid 70s.
Wednesday Night... Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 20%.
Thursday... Partly cloudy. Highs in the upper 70s.
Thursday Night... Partly cloudy. Lows in the mid 50s.
POP = Probability of Precipitation
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