POET Biorefining - Big Stone

	County Forecast for Big Stone City , SD

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050100-
Grant-
Including the city of Milbank
1237 PM CDT Thu Jun 4 2026

This afternoon   Partly sunny with a 50 percent chance of thunderstorms. Highs around 80. Southwest winds around 5 mph.
Tonight   Mostly cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Some thunderstorms may be severe in the evening. Lows in the upper 50s. South winds around 5 mph. Chance of rain 70 percent.
Friday   Mostly cloudy in the morning, then clearing. A chance of showers with a slight chance of thunderstorms. Highs in the upper 70s. West winds around 5 mph. Chance of rain 40 percent.
Friday night   Mostly clear. A chance of thunderstorms in the evening. Lows in the upper 50s. Northwest winds around 5 mph, becoming southwest after midnight. Chance of rain 40 percent.
Saturday   Mostly sunny. Highs in the mid 80s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
Saturday night   Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.
Sunday   Partly sunny. A slight chance of thunderstorms in the afternoon. Hot with highs around 90. Chance of rain 20 percent.
Sunday night   Partly cloudy with a chance of thunderstorms in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 40 percent.
Monday   Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the morning, then partly sunny with showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 60 percent.
Monday night and tuesday   Mostly cloudy. A 20 percent chance of thunderstorms. Lows in the lower 60s. Highs in the upper 80s.
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 30 percent.
Wednesday   Partly sunny. A slight chance of thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon.

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Bryce Anderson – DTN Meteorologist

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Northern Plains Severe Threat Thursday

Scattered showers, thunderstorms for western Midwest, Central and Southern Plains. Severe weather possible for Northern Plains later Thursday. » More DTN Weather Commentary

Posted at 5:32AM Thu Jun 4, 2026 CDT

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