TODAY MAR19
TEMPERATURE26
HUMIDITY65
PRESSURE101970
WIND COND.
  • 6636Tue
  • 5431Wed
  • 4835Thu
  • 6132Fri20%30%
  • 5034Sat
daynightWeather update from St. Louis, Spirit Of St. Louis Airport at
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Weather Quick Facts

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

Compare Lake St. Louis, MO Weather

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      Lake St. Louis 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"

      Lake St. Louis 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.
      IndexLake St. LouisMissouriNational
      Air quality index549742
      Pollution index3,042,5301,630,2552,726,193

      Lake St. Louis 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

      Lake St. Louis air quality information

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

      Average monthly Lake St. Louis temperature with heat index

      Lake St. Louis monthly precipitation with daily maximum

      Lake St. Louis monthly snow depth with daily maximum

      Lake St. Louis monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Flint Hill, MO935548.0%
      Moscow Mills, MO3,234548.0%
      Augusta, MO284548.0%
      Ellisville, MO9,752548.0%
      Defiance, MO68548.0%
      Lake St. Louis, MO16,357548.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Heber, UT16,362468.0%
      Adelphi, MD16,364476.0%
      Red Wing, MN16,3663726.0%
      Cañon City, CO16,3691668.0%
      Dyersburg, TN16,3712648.0%
      Lake St. Louis, MO16,357548.0%
      Source: The Lake St. Louis, 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.