Weather Alert
Sinai Weather Warning NWS WEATHER ALERT FOR THE SINAI, SD AREA - Issued: 440 AM CDT Mon Aug 10 2026 Sinai Weather Warning

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Weather for Sinai, SDSinai, SD Weather & Current Conditions

57061 Weather (Sinai, SD)

Sinai, SD WeatherCurrent Conditions and Weather for Sinai, South Dakota
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Overcast at Sinai (57061), temperature is 63°F17°C, dew point 63°F17°C, humidity 100%. Wind direction is E at 8 mphat 13 km/h with visibility of 10.00 mi16 km. Barometric pressure is 29.94 in1014 mb. Last update: 5:37 am.*
*Time is approximately 5:37 am Mon, Aug 10, 2026. Time will be within 15 minutes of current local time. Sinai weather forecast data is updated every 15 minutes.

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I wanted to analyze todays terrible weather. I checked winds aloft, historical data, barometric pressure, dew points, isobars, temperature variants and cloud formations. I've now determined it's stupid out. ―Gregory Bohn
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Sinai SD Weather - 6:37 am

Sinai Weather Forecast

Weather forecast for: Sinai SD
Last Update: 3:23 am CDT Aug 10, 2026
Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East northeast wind around 10 mph.
Monday: A 20 percent chance of showers and thunderstorms before 9am. Partly sunny, with a high near 84. East southeast wind around 10 mph, with gusts as high as 20 mph.
Monday Night: A chance of showers and thunderstorms. Increasing clouds, with a low around 64. East southeast wind 5 to 10 mph. Chance of precipitation is 50%.
Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. East northeast wind 5 to 10 mph.
Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. East northeast wind around 5 mph.
Wednesday: Partly sunny, with a high near 81. North northeast wind 5 to 10 mph.
Wednesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 60.
Thursday: Mostly cloudy, with a high near 74.
Thursday Night: Mostly cloudy, with a low around 56.
Friday: A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 71.
Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 57.
Saturday: A 30 percent chance of showers. Mostly cloudy, with a high near 71.
Saturday Night: Mostly cloudy, with a low around 56.
Sunday: Partly sunny, with a high near 72.

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