TODAY MAY14
TEMPERATURE49
HUMIDITY56
PRESSURE30.3
WIND COND.180 13
  • 6752Sat60%30%
  • 7156Sun20%60%
  • 7458Mon50%30%
  • 7560Tue30%
  • 7762Wed30%50%
daynightWeather update from Ottumwa, Ottumwa Industrial Airport at

Key findings

  • The highest monthly average temperature in Chillicothe for July is 74.9 degrees
  • The lowest monthly average temperature in Chillicothe for January is 23.5 degrees
  • The most monthly precipitation in Chillicothe occurs in June with 6.5 inches
  • The air quality index in Chillicothe is 30% better than the national average
  • The pollution index in Chillicothe is 91% better than the national average

Compare Chillicothe, IA Weather

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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
      January15°F33°F24°F0.7"
      February17°F36°F26°F1.1"
      March31°F52°F40°F2.3"
      April41°F65°F52°F4.7"
      May51°F74°F62°F5.0"
      June62°F83°F72°F6.5"
      July65°F86°F75°F4.5"
      August63°F84°F73°F5.2"
      September54°F78°F65°F3.7"
      October43°F65°F53°F3.0"
      November32°F52°F41°F2.0"
      December20°F36°F28°F1.9"

      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.
      IndexChillicotheIowaNational
      Air quality index353950
      Pollution index464,3331,643,8365,066,862

      Chillicothe air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality278
      Days with moderate air quality86
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Chillicothe air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.320%
      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.
      Ottumwa, IA24,7092942%
      Agency, IA6192942%
      Hayesville, IA423530%
      Keomah Village, IA693530%
      Kirkville, IA1793530%
      Chillicothe, IA973530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Sedan, MT972550%
      Utica, SD973628%
      Bridgeport, OK97484%
      La Grange, TN974510%
      Smithville, AR974510%
      Chillicothe, IA973530%
      Source: The Chillicothe, IA 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.