County Forecast for Big Stone City , SD
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220600-
Grant-
Including the city of Milbank
542 PM CDT Mon Sep 21 2026

Tonight   Mostly cloudy. Patchy fog after midnight. Lows in the mid 40s. East winds 5 to 10 mph.
Tuesday   Mostly cloudy in the morning, then becoming partly sunny. Highs around 60. Southeast winds 5 to 10 mph with gusts up to 25 mph.
Tuesday night   Partly cloudy. Lows in the upper 40s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
Wednesday   Partly sunny. A slight chance of showers in the afternoon. Highs in the mid 60s. Southeast winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20 percent.
Wednesday night   Showers likely with a slight chance of thunderstorms in the evening, then showers after midnight. Lows in the lower 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.
Thursday through friday   Mostly cloudy with a 20 percent chance of showers. Highs in the upper 60s. Lows in the mid 50s.
Friday night and saturday   Mostly cloudy with a 50 percent chance of showers. Lows in the mid 50s. Highs in the upper 60s.
Saturday night   Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s.
Sunday   Partly sunny. Highs in the upper 60s.
Sunday night   Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the lower 50s. Chance of rain 20 percent.
Monday   Mostly cloudy with a chance of showers in the morning, then partly sunny with a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 50 percent.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Front Continues into Southeast Tuesday
Posted at 12:01PM Mon Sep 21, 2026 CDT
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