County Forecast for Big Stone City , SD
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260400-
Grant-
Including the city of Milbank
331 PM CDT Thu Jun 25 2026

Tonight   Partly cloudy. Lows in the mid 50s. Southeast winds around 5 mph.
Friday   Mostly cloudy in the morning, then partly sunny with a slight chance of showers 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.
Friday night   Partly cloudy. Lows in the lower 60s. Southeast winds 10 to 15 mph with gusts up to 30 mph.
Saturday   Partly sunny. A slight chance of thunderstorms in the afternoon. Breezy with highs in the mid 80s. Southeast winds 20 to 25 mph with gusts up to 40 mph. Chance of rain 20 percent.
Saturday night   Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Breezy with lows in the upper 60s. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 50 percent.
Sunday   Mostly cloudy with a chance of thunderstorms in the morning, then partly sunny in the afternoon. Warmer with highs in the mid 90s. Chance of rain 50 percent.
Sunday night and monday   Mostly clear and breezy, hot. Lows in the lower 70s. Highs in the upper 90s. Heat index values up to 100.
Monday night   Mostly clear with a chance of thunderstorms in the evening, then partly cloudy with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 30 percent. Heat index values up to 100 early in the evening.
Tuesday   Partly sunny with a slight chance of thunderstorms. A chance of showers in the afternoon. Hot with highs in the lower 90s. Chance of rain 30 percent.
Tuesday night   Mostly clear with a chance of thunderstorms in the evening, then partly cloudy with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 40 percent.
Wednesday   Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 30 percent.
Wednesday night   Partly cloudy. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 50 percent.
Thursday   Partly sunny. Hot with highs in the mid 90s.
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Bryce Anderson – DTN Meteorologist
Heavy Rain Moving Into Midwest Friday

Scattered storms today; severe weather and heavy rain spread across the southern Midwest through Friday. » More DTN Weather Commentary

Posted at 12:01PM Thu Jun 25, 2026 CDT
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