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Sully Lake, SD Weather Forecast
Sully Lake, SD Weather Forecast Date: 821 PM CDT Sat Sep 12 2026
The area/counties/county of: Sully, including the city of Onida.or toggle through each period.
Tonight... Mostly cloudy. Lows around 50. Northeast winds 5 to 10 mph, becoming east after midnight.
Sunday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 60s. East winds 15 to 20 mph with gusts up to 30 mph.
Sunday Night... Partly cloudy in the evening, then mostly cloudy with showers with a slight chance of thunderstorms after midnight. Windy with lows in the mid 50s. Southeast winds 15 to 20 mph with gusts up to 30 mph, increasing to 20 to 30 mph with gusts up to 40 mph after midnight. Chance of rain 90%.
Monday... Showers with a slight chance of thunderstorms in the morning, then partly sunny in the afternoon. Windy with highs in the mid 70s. Southeast winds 25 to 30 mph, becoming southwest 20 to 25 mph in the afternoon. Chance of rain 90%.
Monday Night... Mostly clear. Lows in the upper 40s. Northwest winds 15 to 20 mph with gusts up to 30 mph.
Tuesday... Mostly sunny. Highs in the upper 60s.
Tuesday Night... Mostly clear in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the upper 40s. Chance of rain 20%.
Wednesday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers in the morning. A slight chance of thunderstorms. Highs in the upper 60s. Chance of rain 40%.
Wednesday Night... Mostly cloudy. Lows in the upper 40s.
Thursday... Partly sunny. Highs around 70.
Thursday Night... Partly cloudy with a 30% chance of showers. Lows in the lower 50s. Highs in the lower 70s.
Friday... Partly cloudy with a 30% chance of showers. Lows in the lower 50s. Highs in the lower 70s.
POP = Probability of Precipitation
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