County Forecast for Big Stone City , SD
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160400-
Grant-
Including the city of Milbank
322 PM CDT Tue Sep 15 2026

Tonight   Mostly clear. Patchy fog after midnight. Lows in the upper 40s. Northwest winds around 5 mph, becoming northeast around 5 mph after midnight.
Wednesday   Partly sunny. A slight chance of showers in the afternoon. Highs in the lower 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.
Wednesday night   Mostly cloudy. A slight chance of showers in the evening. Lows in the mid 50s. South winds 5 to 10 mph with gusts up to 20 mph, becoming southwest after midnight. Chance of rain 20 percent.
Thursday   Partly sunny in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the lower 70s. North winds 5 to 10 mph, becoming east with gusts up to 20 mph in the afternoon. Chance of rain 20 percent.
Thursday night   Cloudy. A chance of showers in the evening, then showers after midnight. Locally heavy rainfall possible after midnight. Lows in the mid 50s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.
Friday   Showers with a slight chance of thunderstorms in the morning, then a chance of showers in the afternoon. Highs in the mid 60s. Chance of rain 90 percent.
Friday night   Cloudy. A chance of showers in the evening. Lows in the mid 50s. Chance of rain 50 percent.
Saturday   Cloudy. Highs in the upper 60s.
Saturday night   Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s.
Sunday   Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the mid 60s. Chance of rain 30 percent.
Sunday night and monday   Mostly cloudy. A 20 percent chance of showers. Lows in the lower 50s. Highs in the mid 60s.
Monday night and tuesday   Partly cloudy. Lows in the lower 50s. Highs around 70.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Quick System Moves Through the Northern Plains and Southern Canadian Prairies on Wednesday
Posted at 12:03PM Tue Sep 15, 2026 CDT
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