TODAY JUN20
TEMPERATURE74
HUMIDITY91
PRESSURE29.93
WIND COND.330 3.4
  • 8972Wed40%60%
  • 8467Thu60%60%
  • 8164Fri60%60%
  • 8468Sat40%
  • 8668Sun50%30%
daynightWeather update from St. Louis, Spirit Of St. Louis Airport at

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

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Compare Chesterfield, MO Weather To Other Cities

Chesterfield 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.
IndexChesterfieldMissouriNational
Air quality index609750
Pollution index8,870,2302,360,5665,066,862

Chesterfield 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

Chesterfield air quality information

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

Average monthly Chesterfield temperature with heat index

Chesterfield monthly precipitation with daily maximum

Chesterfield monthly snow depth with daily maximum

Chesterfield monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bel-Ridge, MO2,7106020%
Bridgeton, MO11,6986020%
Clarkson Valley, MO2,6386020%
Cottleville, MO4,2056020%
Crystal Lake Park, MO5186020%
Chesterfield, MO47,7176020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Salina, KS47,6763236%
Roseville, MI47,606524%
Coeur d'Alene, ID47,8423922%
Portage, MI47,8543922%
Euclid, OH47,8635510%
Chesterfield, MO47,7176020%
Source: The Chesterfield, 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.