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Johnson Dam, SD Weather Forecast
Johnson Dam, SD Weather Forecast Date: 808 PM MDT Fri Sep 18 2026
The area/counties/county of: Northern Perkins, including the cities of: Lemmon, Shadehill, Meadow, and Prairie City.or toggle through each period.
Rest of Tonight... Cloudy. Lows in the lower 50s. East winds 5 to 10 mph.
Saturday... Cloudy with a 50% chance of showers. Highs in the mid 60s. East winds 10 to 15 mph with gusts up to 25 mph.
Saturday Night... Showers likely. Lows around 50. East winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70%.
Sunday... Showers. Highs in the upper 50s. East winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90%.
Sunday Night... Cloudy. Showers likely in the evening, then a chance of showers after midnight. Lows in the upper 40s. East winds 5 to 10 mph. Gusts up to 25 mph in the evening. Chance of rain 70%.
Monday... Mostly cloudy with a 20% chance of showers. Highs in the lower 60s.
Monday Night... Mostly cloudy. Lows in the upper 40s.
Tuesday... Becoming partly cloudy. Breezy with highs in the upper 60s.
Tuesday Night... Partly cloudy. Lows in the lower 50s.
Wednesday... Partly cloudy in the morning, then clearing. Highs in the mid 70s.
Wednesday Night... Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 50s. Chance of rain 20%.
Thursday... Partly cloudy in the morning, then clearing. Highs in the upper 70s.
Thursday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 50s.
POP = Probability of Precipitation
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