County Forecast for Big Stone City , SD
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190600-
Grant-
Including the city of Milbank
522 PM CDT Fri Sep 18 2026

Tonight   Cloudy with areas of drizzle. Areas of fog. Near steady temperature in the upper 50s. Northeast winds 5 to 10 mph.
Saturday   Cloudy. A slight chance of rain in the morning. Areas of fog in the morning, then patchy fog in the afternoon. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.
Saturday night   Mostly cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph.
Sunday   Mostly cloudy. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Sunday night   Cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows around 50. East winds 5 to 10 mph. Chance of rain 40 percent.
Monday   Mostly cloudy. A slight chance of showers in the morning. Highs in the lower 60s. Chance of rain 20 percent.
Monday night and tuesday   Mostly cloudy. Lows in the mid 40s. Highs in the mid 60s.
Tuesday night   Partly cloudy. Lows in the upper 40s.
Wednesday   Partly sunny. Highs in the upper 60s.
Wednesday night   Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the lower 50s. Chance of rain 30 percent.
Thursday   Mostly cloudy with a slight chance of showers in the morning, then partly sunny in the afternoon. Highs in the lower 70s. Chance of rain 20 percent.
Thursday night   Partly cloudy. Lows in the lower 50s.
Friday   Partly sunny. Highs in the lower 70s.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heavy Rain Moving Through Northern US This Weekend
Posted at 11:40AM Fri Sep 18, 2026 CDT
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