County Forecast for Big Stone City , SD
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261100-
Grant-
Including the city of Milbank
1037 PM CDT Sat Jul 25 2026

..heat advisory in effect until 9 pm cdt sunday   
Rest of tonight   Mostly cloudy with a slight chance of thunderstorms. A chance of showers. Much warmer with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
Sunday   Partly sunny. Hot with highs in the mid 90s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 104 in the afternoon.
Sunday night   Mostly clear. Humid with lows in the lower 70s. South winds 5 to 10 mph, becoming west with gusts up to 20 mph after midnight. Heat index values up to 105 early in the evening.
Monday   Mostly sunny. Hot with highs in the lower 90s. North winds 10 to 15 mph with gusts up to 25 mph.
Monday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. North winds 5 to 10 mph.
Tuesday   Mostly sunny. A slight chance of thunderstorms in the morning. Hot with highs around 90. Chance of rain 20 percent.
Tuesday night and wednesday   Mostly clear. Hot. Lows in the upper 60s. Highs in the lower 90s.
Wednesday night   Mostly clear in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows around 70. Chance of rain 40 percent.
Thursday   Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Chance of rain 50 percent.
Thursday night   Partly cloudy with a 50 percent chance of thunderstorms. Lows in the upper 60s.
Friday   Partly sunny. Highs in the mid 80s.
Friday night and saturday   Mostly clear. Lows in the mid 60s. Highs in the mid 80s.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heating Up This Weekend, Some Limited Showers
Posted at 11:59AM Fri Jul 24, 2026 CDT
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