TODAY MAY28
TEMPERATURE79
HUMIDITY72
PRESSURE29.91
WIND COND.
  • 9671
  • 9070Tue30%
  • 8771Wed40%40%
  • 9172Thu30%20%
  • 9271Fri20%
daynightWeather update from St. Louis, Lambert-St. Louis International Airport at

Maryland Heights 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
January0°F73°F34°F3.2"
February5°F75°F35°F2.3"
March14°F83°F48°F3.7"
April23°F92°F57°F3.4"
May38°F93°F67°F4.7"
June53°F98°F77°F3.9"
July59°F103°F79°F4.1"
August54°F106°F79°F2.4"
September45°F95°F71°F4.3"
October28°F94°F58°F4.1"
November18°F82°F48°F2.8"
December3°F69°F35°F3.5"

Did you know?

  • The highest monthly average temperature in Maryland Heights for August is 79 degrees.
  • The lowest monthly average temperature in Maryland Heights for January is 34 degrees.
  • The most monthly precipitation in Maryland Heights occurs in May with 4.7 inches.
  • The air quality index in Maryland Heights is 20% worse than the national average.
  • The pollution index in Maryland Heights is 75% worse than the national average.

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Compare Maryland Heights, MO Weather To Other Cities

Maryland Heights 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.
IndexMaryland HeightsMissouriNational
Air quality index609750
Pollution index8,870,2302,360,5665,066,862

Maryland Heights 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

Maryland Heights air quality information

PollutantTotal
Arsenic0.180%
Benzene0.060%
Carbon Tetrachloride0.020%
Lead0.030%
Mercury0.120%

Average monthly Maryland Heights temperature with heat index

Maryland Heights monthly precipitation with daily maximum

Maryland Heights monthly snow depth with daily maximum

Maryland Heights monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Alton, IL27,1756020%
East Carondelet, IL5236020%
Affton, MO22,0606020%
Bel-Nor, MO1,3936020%
Black Jack, MO6,9566020%
Maryland Heights, MO27,3596020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Milton, MA27,351476%
Wilmette, IL27,3676020%
Winchester, VA27,3493726%
Winona, MN27,3722158%
Jeffersontown, KY27,3955510%
Maryland Heights, MO27,3596020%
Source: The Maryland Heights, 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.