County Forecast for Big Stone City , SD
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200400-
Grant-
Including the city of Milbank
331 PM CDT Fri Jun 19 2026

Tonight   Mostly clear. Lows around 50. Northwest winds 15 to 20 mph with gusts up to 30 mph, diminishing to 5 to 10 mph after midnight.
Saturday   Mostly sunny. Highs in the mid 70s. Northwest winds around 5 mph, becoming northeast in the afternoon.
Saturday night   Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 50s. East winds 5 to 10 mph.
Sunday   Mostly cloudy. A slight chance of showers in the afternoon. Highs around 70. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.
Sunday night   Mostly cloudy with a 20 percent chance of showers. Lows in the lower 50s. Northeast winds 5 to 10 mph.
Monday   Partly sunny. Highs in the lower 70s.
Monday night and tuesday   Showers likely with a chance of thunderstorms. Lows in the mid 50s. Highs in the lower 70s. Chance of rain 70 percent.
Tuesday night and wednesday   Partly cloudy. A 20 percent chance of thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Wednesday night   Partly cloudy. Lows in the lower 50s.
Thursday   Partly sunny. A slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 20 percent.
Thursday night   Partly cloudy. A slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 20 percent.
Friday   Partly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Tropical Remnants, Fronts, and Another System Producing Rain Through the Weekend
Posted at 12:03PM Thu Jun 18, 2026 CDT
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