TODAY AUG15
TEMPERATURE82
HUMIDITY72
PRESSURE29.87
WIND COND.220 6.9
  • 8870Thu40%
  • 8667Fri60%50%
  • 8767Sat
  • 8869Sun
  • 8566Mon50%50%
daynightWeather update from St. Louis, Spirit Of St. Louis Airport at

Lake St. Louis Average Weather

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"

Did you know?

  • The highest monthly average temperature in Lake St. Louis for July is 79 degrees.
  • The lowest monthly average temperature in Lake St. Louis for January is 32 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 20% worse than the national average.
  • The pollution index in Lake St. Louis is 39% better than the national average.

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Compare Lake St. Louis, MO Weather To Other Cities

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 index609750
Pollution index3,042,5302,360,5665,066,862

Lake St. Louis air quality information

MeasurementTotal
Days measured365
Days with good air quality99
Days with moderate air quality231
Days w/ poor A.Q. for sensitive groups33
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

City, StatePopulationAir Quality IndexNational Avg.
Brussels, IL1236020%
Chesterfield, MO47,7176020%
Defiance, MO1446020%
Fountain N' Lakes, MO3146020%
Moscow Mills, MO2,5656020%
Lake St. Louis, MO15,1506020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
River Falls, WI15,1523628%
Winder, GA15,1483922%
Cullman, AL15,1563726%
North Fair Oaks, CA15,144484%
Gloversville, NY15,1583628%
Lake St. Louis, MO15,1506020%
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.