TODAY JUN01
TEMPERATURE64
HUMIDITY69
PRESSURE30.16
WIND COND.150 6.9
  • 8668Mon20%
  • 9271Tue20%
  • 8767Wed30%30%
  • 8669Thu30%30%
  • 8970Fri40%30%
daynightWeather update from Osceola Municipal Airport at
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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
January20°F34°F26°F2.9"
February27°F47°F36°F2.2"
March35°F56°F44°F8.3"
April45°F65°F54°F4.8"
May51°F73°F61°F6.4"
June63°F87°F75°F4.8"
July67°F88°F77°F8.0"
August62°F84°F72°F5.8"
September58°F81°F69°F9.2"
October46°F69°F56°F8.5"
November35°F56°F45°F4.1"
December21°F36°F28°F2.6"

Did you know?

  • The highest monthly average temperature in St. Charles for July is 77 degrees.
  • The lowest monthly average temperature in St. Charles for January is 26 degrees.
  • The most monthly precipitation in St. Charles occurs in September with 9.2 inches.
  • The air quality index in St. Charles is 18% better than the national average.
  • The pollution index in St. Charles is 93% better than the national average.

Compare St. Charles, IA Weather To Other Cities

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      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. CharlesIowaNational
      Air quality index413950
      Pollution index376,1481,643,8365,066,862

      St. Charles air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality267
      Days with moderate air quality98
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      St. Charles air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.001%
      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

      City, StatePopulationAir Quality IndexNational Avg.
      East Peru, IA984118%
      New Virginia, IA5534118%
      Spring Hill, IA604118%
      Indianola, IA15,3434118%
      Norwalk, IA9,9444118%
      St. Charles, IA7654118%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Watson, IL7653726%
      Bouse, AZ7651864%
      Switzer, WV7653432%
      Flordell Hills, MO7656020%
      Millville, OH765548%
      St. Charles, IA7654118%
      Source: The St. Charles, IA 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.