TODAY OCT22
TEMPERATURE69°F
HUMIDITY78%
PRESSURE29.93 inHg
WIND COND.160° 13.8 mph
  • 6949Sun80% | 50%
  • 6846Mon
  • 5638Tue
  • 5943Wed
  • 6949Thu
daynightWeather update from Sparta Community-Hunter Field Airport, on 22 Oct 05:15 am CDT

Chester 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°F70°F36°Fn/a
February7°F72°F36°Fn/a
March16°F82°F48°Fn/a
April25°F90°F57°Fn/a
May37°F91°F66°Fn/a
June54°F97°F76°Fn/a
July55°F99°F77°Fn/a
August54°F106°F78°Fn/a
September43°F97°F70°Fn/a
October30°F91°F58°Fn/a
November18°F81°F48°Fn/a
December5°F70°F36°Fn/a

Did you know?

  • The highest monthly average temperature in Chester for August is 78 degrees.
  • The lowest monthly average temperature in Chester for January is 36 degrees.
  • The most monthly precipitation in Chester occurs in January with 0 inches.
  • The air quality index in Chester is 20% worse than the national average.
  • The pollution index in Chester is 85% better than the national average.

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Compare Chester, IL Weather To Other Cities

Chester 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.
IndexChesterIllinoisNational
Air quality index604150
Pollution index753,4733,325,3065,100,859

Chester 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

Chester air quality information

PollutantTotal
Arsenic0.001%
Benzene0.010%
Carbon Tetrachloride0.001%
Lead0.020%
Mercury0.020%

Average monthly Chester temperature with heat index

Chester monthly precipitation with daily maximum

Chester monthly snow depth with daily maximum

Chester monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Perryville, MO8,2803922%
Sparta, IL4,3383922%
Cutler, IL4433922%
Percy, IL8003922%
Steeleville, IL1,9303922%
Chester, IL8,4956020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Granbury, TX8,4963334%
Congers, NY8,496536%
Monroe, NY8,4933628%
Winchester, TN8,4933726%
Florence, OR8,4981080%
Chester, IL8,4956020%
Source: The Chester, 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.