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Sinai, SD 7-Day Weather Forecast
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Sinai Weather Forecast
Sinai, SD Weather Forecast Date: 629 AM CDT Sat Aug 01 2026
Weather forecast for Sinai, SD
Today Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Today... Areas of fog this morning. Mostly sunny. Highs in the upper 70s. North winds 5 to 10 mph with gusts up to 20 mph. |
| Sun Hi: 80°FHi: 27°C Lo: 61°F Lo: 16°C |
Sunday... Mostly sunny. Humid with highs around 80. South winds 15 to 20 mph. |
| Mon Hi: 81°FHi: 27°C Lo: 60°F Lo: 16°C |
Monday... Mostly sunny and breezy with highs in the lower 80s. South winds 20 to 25 mph with gusts up to 35 mph. |
Tue Hi: 71°FHi: 22°C Lo: 51°F Lo: 11°C |
Tuesday... Mostly cloudy with a chance of showers in the morning, then partly sunny in the afternoon. Highs in the lower 70s. Chance of rain 50%. |
| Wed Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Wednesday... Mostly sunny. Highs in the lower 70s. |
Thu Hi: 79°FHi: 26°C Lo: 60°F Lo: 16°C |
Thursday... Partly sunny in the morning, then clearing. Highs in the upper 70s. |
| Fri Hi: 80°FHi: 27°C |
Friday... Mostly sunny. Highs around 80. |
Sinai Radar Loop
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