County Forecast for Onida , SD
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012300-
Sully-
Including the city of Onida
1022 AM CDT Thu Oct 1 2026

Rest of today   Partly sunny. A slight chance of showers late this morning. Much cooler with highs in the lower 60s. North winds 10 to 15 mph. Chance of rain 20 percent.
Tonight   Mostly cloudy after midnight. Lows in the mid 40s. North winds 5 to 10 mph, becoming east after midnight.
Friday   Mostly cloudy in the morning, then becoming partly sunny. Breezy with highs in the mid 60s. Southeast winds 15 to 25 mph. Gusts up to 40 mph in the afternoon.
Friday night   Mostly clear and breezy. Lows in the upper 40s. Southeast winds 15 to 25 mph with gusts up to 35 mph.
Saturday   Mostly sunny. Highs in the lower 70s. South winds 5 to 10 mph, becoming northwest 10 to 15 mph in the afternoon.
Saturday night through sunday night   Mostly clear. Lows in the mid 40s. Highs in the mid 60s.
Monday   Mostly sunny and breezy. Highs in the lower 70s.
Monday night and tuesday   Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.
Tuesday night and wednesday   Mostly clear. Lows in the lower 50s. Highs in the lower 70s.
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Bryce Anderson image
Bryce Anderson – DTN Meteorologist
Heavy Rain Continues from Kansas to Michigan Thursday
Posted at 5:34AM Thu Oct 1, 2026 CDT
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