County Forecast for Big Stone City , SD
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221900-
Grant-
Including the city of Milbank
606 AM CDT Sat Aug 22 2026

Today   Sunny. Highs in the upper 70s. North winds 5 to 10 mph.
Tonight   Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s. North winds around 5 mph, becoming southwest after midnight.
Sunday   Partly sunny. Highs in the upper 70s. Southeast winds 5 to 10 mph.
Sunday night   Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows around 60. Southeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.
Monday   Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Highs in the upper 70s. Southeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Monday night   Partly cloudy. A chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 50 percent.
Tuesday through thursday   Mostly clear. Highs in the lower 80s. Lows around 60.
Thursday night and friday   Partly cloudy. A 20 percent chance of thunderstorms. Lows in the lower 60s. Highs in the lower 80s.
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Bryce Anderson – DTN Meteorologist
System Moving Through Midwest This Weekend, Another Next Week
Posted at 12:17PM Fri Aug 21, 2026 CDT
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