TODAY DEC19
TEMPERATURE41
HUMIDITY60
PRESSURE29.98
WIND COND.150 3.4
  • 5543Wed
  • 4732Thu60%30%
  • 4129Fri
  • 4831Sat
  • 4428Sun20%
daynightWeather update from St. Louis, Lambert-St. Louis International Airport at

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Clayton 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
January24°F45°F33°F2.4"
February25°F48°F35°F2.2"
March37°F61°F48°F3.6"
April47°F72°F59°F5.4"
May57°F80°F68°F4.6"
June67°F89°F78°F5.2"
July70°F92°F81°F4.2"
August69°F91°F79°F3.6"
September61°F84°F72°F4.3"
October48°F72°F60°F3.4"
November37°F60°F48°F3.4"
December27°F47°F37°F3.5"

Did you know?

  • The highest monthly average temperature in Clayton for July is 81 degrees.
  • The lowest monthly average temperature in Clayton for January is 33 degrees.
  • The most monthly precipitation in Clayton occurs in April with 5.4 inches.
  • The air quality index in Clayton is 20% worse than the national average.
  • The pollution index in Clayton is 67% worse than the national average.

Real Estate Listings In Clayton

Compare Clayton, MO Weather To Other Cities

Clayton 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.
IndexClaytonMissouriNational
Air quality index609750
Pollution index8,473,0502,360,5665,066,862

Clayton 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

Clayton air quality information

PollutantTotal
Arsenic0.020%
Benzene0.070%
Carbon Tetrachloride0.020%
Lead0.010%
Mercury0.010%

Average monthly Clayton temperature with heat index

Clayton monthly precipitation with daily maximum

Clayton monthly snow depth with daily maximum

Clayton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Alorton, IL1,9086020%
Columbia, IL10,1936020%
Fairmont City, IL2,3496020%
Millstadt, IL3,9116020%
South Roxana, IL2,3166020%
Clayton, MO16,0346020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Easthampton Town, MA16,0423922%
Highland Village, TX16,020548%
Storrs, CT16,0593334%
Vero Beach, FL16,0703432%
Brunswick, GA15,9973138%
Clayton, MO16,0346020%
Source: The Clayton, 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.