TODAY JUN19
TEMPERATURE85
HUMIDITY74
PRESSURE29.94
WIND COND.210 3.4
  • 8468Tue30%60%
  • 8065Wed50%50%
  • 7764Thu50%70%
  • 7863Fri
  • 7963Sat
daynightWeather update from Marshall County Airport at

Chillicothe 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-9°F66°F29°Fn/a
February-11°F59°F27°Fn/a
March10°F77°F40°Fn/a
April19°F86°F52°Fn/a
May28°F95°F62°Fn/a
June45°F97°F72°Fn/a
July48°F104°F75°Fn/a
August52°F99°F74°Fn/a
September36°F95°F67°Fn/a
October23°F90°F54°Fn/a
November16°F73°F42°Fn/a
December-6°F54°F29°Fn/a

Did you know?

  • The highest monthly average temperature in Chillicothe for July is 75 degrees.
  • The lowest monthly average temperature in Chillicothe for February is 27 degrees.
  • The most monthly precipitation in Chillicothe occurs in January with 0 inches.
  • The air quality index in Chillicothe is 3% better than the national average.
  • The pollution index in Chillicothe is 93% better than the national average.

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Compare Chillicothe, IL Weather To Other Cities

Chillicothe 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.
IndexChillicotheIllinoisNational
Air quality index484150
Pollution index339,1563,347,2955,066,862

Chillicothe air quality information

MeasurementTotal
Days measured365
Days with good air quality207
Days with moderate air quality132
Days w/ poor A.Q. for sensitive groups21
Days with unhealthy air quality5

Chillicothe air quality information

PollutantTotal
Arsenic0.000%
Benzene0.020%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Chillicothe temperature with heat index

Chillicothe monthly precipitation with daily maximum

Chillicothe monthly snow depth with daily maximum

Chillicothe monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bay View Gardens, IL382484%
Henry, IL2,348484%
Metamora, IL3,632484%
Rome, IL1,754484%
Washburn, IL1,007484%
Chillicothe, IL6,169484%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Cold Spring, KY6,168548%
Marble Falls, TX6,1674118%
Holly, MI6,1713824%
Schuyler, NE6,1713432%
East Alton, IL6,1716020%
Chillicothe, IL6,169484%
Source: The Chillicothe, 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.