TODAY JUN02
TEMPERATURE73
HUMIDITY56
PRESSURE29.99
WIND COND.200 11.4
  • 9070Tue
  • 8763Wed60%
  • 8767Thu30%40%
  • 8764Fri30%40%
  • 8461Sat
daynightWeather update from Marshall County Airport at
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Chillicothe 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
January18°F34°F25°F3.2"
February19°F36°F27°F3.2"
March32°F51°F41°F5.1"
April42°F64°F52°F6.5"
May53°F74°F63°F7.0"
June62°F82°F72°F7.0"
July65°F85°F74°F7.2"
August64°F84°F73°F8.3"
September57°F78°F66°F7.1"
October45°F65°F54°F6.0"
November34°F52°F42°F4.6"
December23°F38°F30°F3.8"

Did you know?

  • The highest monthly average temperature in Chillicothe for July is 74 degrees.
  • The lowest monthly average temperature in Chillicothe for January is 25 degrees.
  • The most monthly precipitation in Chillicothe occurs in August with 8.3 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.

Compare Chillicothe, IL Weather To Other Cities

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      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.
      Eureka, IL5,827484%
      Lacon, IL1,837484%
      Peoria Heights, IL6,019484%
      Spring Bay, IL507484%
      Wyoming, IL1,514484%
      Chillicothe, IL6,169484%

      Cities with similar population

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