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Sinai, SD 7-Day Weather Forecast
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Sinai Weather Forecast
Sinai, SD Weather Forecast Date: 549 PM CDT Sat Aug 08 2026
Weather forecast for Sinai, SD
Tonight Lo: 61°F Lo: 16°C |
Tonight... Partly cloudy this evening, then becoming mostly cloudy. A chance of showers. A slight chance of thunderstorms this evening, then a chance of thunderstorms after midnight. Not as cool with lows in the lower 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50%. |
Sun Hi: 80°FHi: 27°C Lo: 61°F Lo: 16°C |
Sunday... Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning. Humid with highs around 80. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 40%. |
Mon Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Monday... Mostly sunny. Humid with highs in the lower 80s. East winds 5 to 10 mph with gusts up to 20 mph. |
Tue Hi: 81°FHi: 27°C Lo: 61°F Lo: 16°C |
Tuesday... Partly sunny. Highs in the lower 80s. |
| Wed Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Wednesday... Mostly sunny. Highs in the upper 70s. |
| Thu Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Thursday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 70s. |
| Fri Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Friday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 70s. |
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