TODAY MAY28
TEMPERATURE74
HUMIDITY76
PRESSURE29.9
WIND COND.
  • 9469
  • 9068Tue20%
  • 8569Wed40%40%
  • 8868Thu30%30%
  • 8867Fri30%
daynightWeather update from Quincy Regional Airport-Baldwin Field at

Clayton 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
January-10°F68°F29°F2.0"
February-8°F69°F30°F1.9"
March10°F78°F43°F2.6"
April19°F86°F54°F3.7"
May31°F92°F63°F2.8"
June50°F96°F73°F5.1"
July55°F104°F75°F2.6"
August49°F103°F75°F4.0"
September37°F94°F67°F3.2"
October25°F93°F54°F3.3"
November12°F75°F44°F1.8"
December-2°F65°F30°F2.2"

Did you know?

  • The highest monthly average temperature in Clayton for July is 75 degrees.
  • The lowest monthly average temperature in Clayton for January is 29 degrees.
  • The most monthly precipitation in Clayton occurs in June with 5.1 inches.
  • The air quality index in Clayton is 31% better than the national average.
  • The pollution index in Clayton is 95% better than the national average.

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Compare Clayton, IL 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.
IndexClaytonIllinoisNational
Air quality index344150
Pollution index222,6333,347,2955,066,862

Clayton air quality information

MeasurementTotal
Days measured304
Days with good air quality296
Days with moderate air quality8
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Clayton air quality information

PollutantTotal
Arsenic0.003%
Benzene0.010%
Carbon Tetrachloride0.000%
Lead0.002%
Mercury0.000%

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.
Golden, IL6433432%
Mound Station, IL1583432%
Camden, IL1003432%
La Prairie, IL683432%
Mount Sterling, IL2,1843432%
Clayton, IL6073432%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Keota, OK6073530%
Poplar, WI6073726%
Walsh, CO607688%
Rawlings, MD6073236%
South Williamson, KY6073824%
Clayton, IL6073432%
Source: The Clayton, IL 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.