Sinai, SD Weather Forecast

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Sinai, SD Weather Forecast

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Sinai SD weather  - Clear - 52°F
Clear
52°F
Updated 2:36 pm
Feels Like 52°F
Humidity 68%
Wind WNW 12 mph
Barometer  29.98 in
Dew Point 42°F
Sinai SD weather  - Clear - 11°C
Clear
11°C
Updated 2:36 pm
Feels Like 11°C
Humidity 68%
Wind WNW 19 km/h
Barometer  101.5 kPa
Dew Point 6°C

Sinai Weather Forecast

THIS AFTERNOON TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT
Sinai, SD Weather - This Afternoon Mostly Sunny Sinai, SD Weather - Tonight Partly Cloudy Sinai, SD Weather - Wednesday Mostly Sunny Sinai, SD Weather - Wednesday Night Chance Of Showers Sinai, SD Weather - Thursday Chance Of Showers Sinai, SD Weather - Thursday Night Partly Cloudy Sinai, SD Weather - Friday Sunny Sinai, SD Weather - Friday Night Clear Sinai, SD Weather - Saturday Sunny Sinai, SD Weather - Saturday Night Mostly Clear Sinai, SD Weather - Sunday Mostly Sunny Sinai, SD Weather - Sunday Night Partly Cloudy
Mostly Sunny Partly Cloudy Mostly Sunny Chance of Showers Chance of Showers Partly Cloudy Sunny Clear Sunny Mostly Clear Mostly Sunny Partly Cloudy
Hi: 55°FHi: 13°C
Lo: 35°FLo: 2°C Hi: 59°FHi: 15°C
Lo: 40°FLo: 4°C Hi: 59°FHi: 15°C
Lo: 35°FLo: 2°C Hi: 55°FHi: 13°C
Lo: 31°FLo: -1°C Hi: 65°FHi: 18°C
Lo: 41°FLo: 5°C Hi: 69°FHi: 21°C
Lo: 41°FLo: 5°C
POP: 50% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 134 PM CDT Tue Oct 13 2026 Sinai, SD Weather - WeatherWorld.com

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Issued: 1248 PM CDT Tue Oct 13 2026

Key Messages

  • Near to below normal temperatures will dominate the work week with highs in the 50s to lower 60s.
  • Outside of sprinkles this afternoon, scattered rain returns by Thursday with a 60-80% probability of greater than 0.10" of rain.
  • Nighttime lows may locally dip into the mid-upper 30s through Friday, but more widespread 30s with light winds/clear skies and a better frost potential will be Friday night/Saturday morning.
  • Warmer temperatures return through the weekend into early next week wi...