County Forecast for Big Stone City , SD
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231100-
Grant-
Including the city of Milbank
1037 PM CDT Wed Jul 22 2026

Rest of tonight   Clear. Lows in the upper 50s. South winds 5 to 10 mph.
Thursday   Partly sunny. Highs in the lower 80s. South winds 10 to 15 mph with gusts up to 25 mph.
Thursday night   Mostly cloudy. Lows in the lower 60s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
Friday   Partly sunny. Humid with highs in the mid 80s. South winds 10 to 15 mph with gusts up to 25 mph.
Friday night   Mostly clear. Humid with lows in the upper 60s. Southwest winds 15 to 20 mph with gusts up to 35 mph.
Saturday and saturday night   Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s.
Sunday   Partly sunny. Hot with highs in the mid 90s. Heat index values up to 100 in the afternoon.
Sunday night   Mostly clear. Lows in the lower 70s. Heat index values up to 100 early in the evening.
Monday and monday night   Partly cloudy. Hot. Highs in the lower 90s. Lows in the upper 60s.
Tuesday and tuesday night   Mostly clear. Highs in the upper 80s. Lows in the mid 60s.
Wednesday   Mostly sunny. A slight chance of thunderstorms in the morning. Highs in the upper 80s. Chance of rain 20 percent.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
More Rain in Central Plains Thursday
Posted at 12:12PM Wed Jul 22, 2026 CDT
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