County Forecast for Big Stone City , SD
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110900-
Grant-
Including the city of Milbank
836 PM CDT Fri Jul 10 2026

...HEAT ADVISORY IN EFFECT FROM NOON SATURDAY TO 7 PM CDT
TUESDAY...

Tonight   Mostly clear. Lows in the upper 60s. South winds 5 to 10 mph.
Saturday   Mostly sunny. Hot with highs in the lower 90s. South winds 5 to 10 mph with gusts up to 20 mph.
Saturday night   Clear with lows around 70. South winds 10 to 15 mph.
Sunday   Sunny, hot with highs in the lower 90s. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 100.
Sunday night   Clear with lows in the lower 70s. South winds 10 to 15 mph with gusts up to 30 mph.
Monday   Sunny, hot with highs in the mid 90s.
Monday night through wednesday night   Mostly clear. Hot. Lows around 70. Highs in the lower 90s.
Thursday and thursday night   Mostly clear. A 20 percent chance of thunderstorms. Highs in the upper 80s. Lows in the upper 60s.
Friday   Partly sunny. Highs in the upper 80s.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Extreme Heat Building Into Northern Plains This Weekend
Posted at 12:03PM Fri Jul 10, 2026 CDT
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