TODAY MAR28
TEMPERATURE56
HUMIDITY35
PRESSURE102240
WIND COND.220 13
  • 7454Fri30%
  • 7349Sat30%30%
  • 7358Sun50%50%
  • 7747Mon60%70%
  • 6036Tue40%
daynightWeather update from St. Charles, St. Charles County Smartt Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Chain of Rocks for July is 78.7 degrees
  • The lowest monthly average temperature in Chain of Rocks for January is 32.1 degrees
  • The most monthly precipitation in Chain of Rocks occurs in April with 5.3 inches
  • The air quality index in Chain of Rocks is 28% worse than the national average
  • The pollution index in Chain of Rocks is 12% worse than the national average

Compare Chain of Rocks, MO Weather

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      Chain of Rocks 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
      January23°F44°F32°F2.1"
      February25°F46°F35°F1.8"
      March36°F60°F47°F3.7"
      April46°F71°F58°F5.3"
      May55°F78°F66°F4.5"
      June65°F87°F76°F4.8"
      July68°F90°F79°F2.9"
      August66°F89°F77°F3.4"
      September58°F82°F69°F3.9"
      October46°F70°F57°F3.0"
      November36°F59°F46°F2.8"
      December27°F45°F35°F3.1"

      Chain of Rocks 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.
      IndexChain of RocksMissouriNational
      Air quality index549742
      Pollution index3,042,5301,630,2552,726,193

      Chain of Rocks air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Chain of Rocks air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.040%
      Carbon Tetrachloride0.010%
      Lead0.010%
      Mercury0.001%

      Average monthly Chain of Rocks temperature with heat index

      Chain of Rocks monthly precipitation with daily maximum

      Chain of Rocks monthly snow depth with daily maximum

      Chain of Rocks monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Josephville, MO632548.0%
      Old Monroe, MO173548.0%
      Dardenne Prairie, MO13,385548.0%
      Weldon Spring, MO5,536548.0%
      Batchtown, IL202548.0%
      Chain of Rocks, MO252548.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Anderson, AL2523726.0%
      Carolina, AL2523138.0%
      Geiger, AL2523628.0%
      Waverly, AL2524216.0%
      O'Kean, AR2522648.0%
      Chain of Rocks, MO252548.0%
      Source: The Chain of Rocks, MO 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.