Weather WorldJohnson Dam, SD 7-Day Weather Forecast
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Johnson Dam Weather Forecast
Johnson Dam, SD Weather Forecast Date: 912 PM MDT Mon Sep 21 2026
Weather forecast for Johnson Dam, SD
Tonight Lo: 45°F Lo: 7°C |
Tonight... Mostly cloudy. Lows in the mid 40s. Southeast winds 10 to 15 mph with gusts up to 25 mph. |
Tue Hi: 61°FHi: 16°C Lo: 50°F Lo: 10°C |
Tuesday... Mostly cloudy and breezy. Highs in the lower 60s. Southeast winds 10 to 20 mph, increasing to 20 to 30 mph in the afternoon. |
Wed Hi: 75°FHi: 24°C Lo: 49°F Lo: 9°C |
Wednesday... Cloudy in the morning, then becoming partly cloudy. Showers likely with a slight chance of thunderstorms. Highs in the mid 70s. South winds 10 to 20 mph with gusts up to 30 mph. Chance of rain 70%. |
Thu Hi: 75°FHi: 24°C Lo: 51°F Lo: 11°C |
Thursday... Mostly sunny. Highs in the mid 70s. |
Fri Hi: 71°FHi: 22°C Lo: 51°F Lo: 11°C |
Friday... Partly cloudy. A slight chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 20%. |
Sat Hi: 75°FHi: 24°C Lo: 49°F Lo: 9°C |
Saturday... Partly cloudy in the morning, then clearing. Highs in the mid 70s. |
| Sun Hi: 69°FHi: 21°C Lo: 49°F Lo: 9°C |
Sunday... Partly cloudy. Highs in the upper 60s. |
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