TODAY NOV21
TEMPERATURE41
HUMIDITY39
PRESSURE102370
WIND COND.320 13
  • 4724Fri
  • 4531Sat
  • 3916Sun20%
  • 3017Mon
  • 3515Tue
daynightWeather update from Winner, Bob Wiley Field Airport at
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Weather Quick Facts

  • The highest monthly average temperature in St. Charles for July is 77.4 degrees
  • The lowest monthly average temperature in St. Charles for January is 24.9 degrees
  • The most monthly precipitation in St. Charles occurs in June with 3.9 inches
  • The air quality index in St. Charles is 14% better than the national average
  • The pollution index in St. Charles is 93% better than the national average

Compare St. Charles, SD Weather

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      St. Charles 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
      January16°F37°F25°F0.2"
      February16°F38°F26°F0.3"
      March28°F53°F38°F0.7"
      April37°F62°F48°F2.4"
      May47°F72°F59°F3.5"
      June58°F83°F70°F3.9"
      July65°F92°F77°F1.9"
      August62°F88°F74°F3.4"
      September53°F80°F65°F1.8"
      October41°F65°F51°F1.8"
      November28°F52°F39°F0.3"
      December16°F36°F25°F0.3"

      St. Charles 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.
      IndexSt. CharlesSouth DakotaNational
      Air quality index363642
      Pollution index179,967345,6232,726,193

      St. Charles air quality

      MeasurementTotal
      Days measured365
      Days with good air quality321
      Days with moderate air quality43
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

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

      Average monthly St. Charles temperature with heat index

      St. Charles monthly precipitation with daily maximum

      St. Charles monthly snow depth with daily maximum

      St. Charles monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Anoka, NE353628.0%
      Fairfax, SD1383628.0%
      Butte, NE3483628.0%
      Burke, SD7053628.0%
      Naper, NE833628.0%
      St. Charles, SD83628.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Platinum, AK83138.0%
      Ugashik, AK83138.0%
      Natural Bridge, AL84118.0%
      Charco, AZ87448.0%
      Mojave Ranch Estates, AZ81374.0%
      St. Charles, SD83628.0%
      Source: The St. Charles, 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.