Lake Sinai, SD Weather Forecast

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Lake Sinai, SD Weather Forecast

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Lake Sinai SD weather  - Clear - 77°F
Clear
77°F
Updated 8:11 pm
Feels Like 75°F
Humidity 61%
Wind NNE 3 mph
Barometer  29.95 in
Dew Point 63°F
Lake Sinai SD weather  - Clear - 25°C
Clear
25°C
Updated 8:11 pm
Feels Like 24°C
Humidity 61%
Wind NNE 5 km/h
Barometer  101.4 kPa
Dew Point 17°C

Lake Sinai Weather Forecast

TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY
Lake Sinai, SD Weather - Tonight Partly Cloudy Lake Sinai, SD Weather - Tuesday Chance Of T-Storm Lake Sinai, SD Weather - Tuesday Night Chance Of T-Storm Lake Sinai, SD Weather - Wednesday Mostly Sunny Lake Sinai, SD Weather - Wednesday Night Chance Of T-Storm Lake Sinai, SD Weather - Thursday Sunny Lake Sinai, SD Weather - Thursday Night Mostly Clear Lake Sinai, SD Weather - Friday Sunny Lake Sinai, SD Weather - Friday Night Partly Cloudy Lake Sinai, SD Weather - Saturday Mostly Sunny Lake Sinai, SD Weather - Saturday Night Partly Cloudy Lake Sinai, SD Weather - Sunday Mostly Sunny
Partly Cloudy Chance of T-Storm Chance of T-Storm Mostly Sunny Chance of T-Storm Sunny Mostly Clear Sunny Partly Cloudy Mostly Sunny Partly Cloudy Mostly Sunny
Lo: 61°FLo: 16°C Hi: 81°FHi: 27°C
Lo: 60°FLo: 16°C Hi: 81°FHi: 27°C
Lo: 65°FLo: 18°C Hi: 89°FHi: 32°C
Lo: 69°FLo: 21°C Hi: 89°FHi: 32°C
Lo: 70°FLo: 21°C Hi: 89°FHi: 32°C
Lo: 69°FLo: 21°C Hi: 85°FHi: 29°C
POP: 20% POP: 70% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 529 PM CDT Mon Aug 31 2026 Lake Sinai, SD Weather - WeatherWorld.com

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Issued: 700 PM CDT Mon Aug 31 2026

Key Messages

  • Strong to severe storms look to return to the area tomorrow (Tuesday) between 6 pm to 2 am. Large hail up to the size of golf balls, damaging winds to 70 mph, and an isolated tornado are the main hazards. Some uncertainty regarding storm mode remains.
  • Near to above normal temperatures look to continue through this week. Confidence continues to increase in further increasing temperatures and humidity for the end of this week and weekend.
  • Low chances (15-30%) for rain will accompany in...