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Johnson Lake, SD Weather Forecast
Johnson Lake, SD Weather Forecast Date: 809 AM CDT Mon Sep 21 2026
The area/counties/county of: Brookings, including the city of Brookings.or toggle through each period.
Rest of Today... Showers early this morning, then drizzle and showers likely this afternoon. Cooler. Near steady temperature in the lower 50s. East winds around 10 mph with gusts up to 20 mph. Chance of rain 90%.
Tonight... Cloudy. A chance of drizzle in the evening, then patchy drizzle after midnight. Patchy fog after midnight. Lows in the mid 40s. East winds 5 to 10 mph.
Tuesday... Mostly cloudy in the morning, then becoming mostly sunny. Highs in the lower 60s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
Tuesday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 40s. Southeast winds around 10 mph with gusts up to 20 mph.
Wednesday... Partly sunny. A slight chance of showers in the afternoon. Highs in the mid 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 20%.
Wednesday Night... Mostly cloudy with a slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows around 50. Chance of rain 70%.
Thursday... Mostly cloudy. Highs in the mid 60s.
Thursday Night... Mostly cloudy. A chance of showers after midnight. Lows in the lower 50s. Chance of rain 30%.
Friday... Cloudy in the morning, then becoming partly sunny. A 30% chance of showers. Highs in the upper 60s.
Friday Night... Mostly cloudy. A chance of showers after midnight. Lows in the mid 50s. Chance of rain 50%.
Saturday... Cloudy in the morning, then becoming partly sunny. Highs in the mid 60s.
Saturday Night... Mostly cloudy. A chance of showers after midnight. Lows in the mid 50s. Chance of rain 30%.
POP = Probability of Precipitation
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