TODAY MAR29
TEMPERATURE29
HUMIDITY72
PRESSURE101360
WIND COND.110 25.9
  • 4422Fri
  • 4127Sat
  • 4129Sun50%50%
  • 4124Mon70%30%
  • 4826Tue
daynightWeather update from Brookings, Brookings Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Sinai for July is 72.7 degrees
  • The lowest monthly average temperature in Sinai for January is 15.6 degrees
  • The most monthly precipitation in Sinai occurs in September with 8.2 inches
  • The air quality index in Sinai is equal to the national average
  • The pollution index in Sinai is 57% better than the national average

Compare Sinai, SD Weather

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      Sinai Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January8°F25°F16°F0.4"
      February11°F29°F19°F0.7"
      March24°F42°F32°F1.7"
      April35°F57°F45°F2.7"
      May46°F70°F57°F4.4"
      June57°F79°F67°F6.6"
      July62°F84°F73°F6.9"
      August59°F80°F69°F7.0"
      September50°F73°F61°F8.2"
      October38°F59°F47°F5.0"
      November25°F46°F34°F1.5"
      December11°F28°F18°F1.6"

      Sinai air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexSinaiSouth DakotaNational
      Air quality index423642
      Pollution index1,169,770345,6232,726,193

      Sinai air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality284
      Days with moderate air quality76
      Days w/ poor A.Q. for sensitive groups5
      Days with unhealthy air quality0

      Sinai air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.002%
      Lead0.010%
      Mercury0.000%

      Average monthly Sinai temperature with heat index

      Sinai monthly precipitation with daily maximum

      Sinai monthly snow depth with daily maximum

      Sinai monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Ramona, SD4134216.0%
      Hetland, SD104216.0%
      Bruce, SD2594216.0%
      Oldham, SD1314216.0%
      Brookings, SD24,4794216.0%
      Sinai, SD1664216.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Movico, AL1664216.0%
      Sierraville, CA1664412.0%
      Wawona, CA16650= 100
      Bethune, CO1664510.0%
      Crook, CO1661962.0%
      Sinai, SD1664216.0%
      Source: The Sinai, SD weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.