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Post Lake, SD Weather Forecast
Post Lake, SD Weather Forecast Date: 821 PM CDT Fri Oct 30 2026
The area/counties/county of: Sully, including the city of Onida.or toggle through each period.
Tonight... Mostly cloudy. A chance of sprinkles this evening, then a chance of rain after midnight. Not as cool with lows in the upper 40s. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40%.
Saturday... Cloudy. A slight chance of showers in the morning. Highs in the lower 60s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20%.
Saturday Night... Mostly cloudy. Lows around 50. Southeast winds 10 to 15 mph with gusts up to 25 mph.
Sunday... Mostly cloudy. Highs in the mid 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph.
Sunday Night... Cloudy. Rain likely after midnight. Lows in the lower 50s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70%.
Monday... Rain, breezy with highs in the upper 50s. Chance of rain 90%.
Monday Night... Rain likely. Windy with lows in the lower 40s. Chance of rain 70%.
Tuesday... Cloudy with a chance of rain in the morning, then partly sunny with a slight chance of rain in the afternoon. Very windy with highs around 50. Chance of rain 50%.
Tuesday Night... Partly cloudy. Lows in the mid 30s. Highs in the upper 40s.
Wednesday... Partly cloudy. Lows in the mid 30s. Highs in the upper 40s.
Thursday... Partly cloudy. Lows in the mid 30s. Highs in the upper 40s.
POP = Probability of Precipitation
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