County Forecast for Big Stone City , SD
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071400-
Grant-
Including the city of Milbank
132 AM CDT Fri Aug 7 2026

Rest of tonight   Partly cloudy with a 20 percent chance of thunderstorms. Near steady temperature in the mid 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph.
Friday   Partly sunny. Highs in the upper 70s. Northwest winds 10 to 15 mph with gusts up to 25 mph.
Friday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s. Northwest winds 5 to 10 mph with gusts up to 20 mph, becoming southwest after midnight.
Saturday   Partly sunny. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Saturday night   Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. South winds 5 to 10 mph. Chance of rain 20 percent.
Sunday   Partly sunny. Highs around 80.
Sunday night   Mostly cloudy. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 50 percent.
Monday   Partly sunny. Highs in the upper 70s.
Monday night   Partly cloudy with a 20 percent chance of thunderstorms. Lows in the upper 50s.
Tuesday   Partly sunny. Highs in the upper 70s.
Tuesday night through wednesday night   Partly cloudy with a 20 percent chance of thunderstorms. Lows in the upper 50s. Highs in the mid 70s.
Thursday   Partly sunny. Highs in the lower 70s.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Showers Move into the Ohio Valley on Friday
Posted at 12:01PM Thu Aug 6, 2026 CDT
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