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Posey Lake, SD Weather Forecast
Posey Lake, SD Weather Forecast Date: 527 PM MDT Thu Oct 08 2026
The area/counties/county of: Bennett, including the cities of: Martin, Allen, Tuthill, and Harrington.or toggle through each period.
Tonight... Clear. Lows in the upper 40s. Northeast winds 5 to 10 mph, becoming southwest after midnight.
Friday... Sunny. Highs in the upper 80s. South winds 10 to 20 mph with gusts up to 35 mph.
Friday Night... Clear. Lows in the lower 60s. South winds 10 to 20 mph with gusts up to 30 mph.
Saturday... Sunny. Highs in the upper 80s. Southwest winds 10 to 20 mph with gusts up to 30 mph.
Saturday Night... Partly cloudy. Lows in the mid 50s. Southwest winds 10 to 20 mph with gusts up to 30 mph.
Sunday... Partly cloudy. Much cooler with highs in the mid 60s.
Sunday Night... Partly cloudy in the evening, then mostly cloudy with a slight chance of rain after midnight. Lows in the lower 40s. Chance of rain 20%.
Columbus Day... Mostly cloudy with a slight chance of rain in the morning, then partly cloudy in the afternoon. Highs in the lower 60s. Chance of rain 20%.
Monday Night... Partly cloudy. A slight chance of rain in the evening, then a chance of rain after midnight. Lows around 40. Chance of rain 30%.
Tuesday... Partly cloudy. Highs in the lower 60s.
Tuesday Night... Partly cloudy. A slight chance of rain in the evening, then a chance of rain after midnight. Lows in the upper 40s. Chance of rain 50%.
Wednesday... Partly cloudy with a 50% chance of rain. Breezy with highs in the mid 60s.
Wednesday Night... Partly cloudy with a 50% chance of rain. Breezy with lows in the mid 40s.
POP = Probability of Precipitation
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