TODAY JUN18
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 937230%
  • 9471Thu30%
  • 9674Fri
  • 9872Sat50%
  • 9064Sun
daynightWeather update from Galesburg Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Knoxville for July is 74.7 degrees
  • The lowest monthly average temperature in Knoxville for January is 24.4 degrees
  • The most monthly precipitation in Knoxville occurs in September with 8.9 inches
  • The air quality index in Knoxville is 3% better than the national average
  • The pollution index in Knoxville is 37% better than the national average

Compare Knoxville, IL Weather

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      Knoxville 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
      January17°F34°F24°F3.4"
      February18°F36°F26°F3.6"
      March32°F52°F41°F3.5"
      April41°F65°F52°F6.9"
      May52°F74°F63°F7.1"
      June62°F83°F72°F7.9"
      July65°F86°F75°F8.4"
      August63°F84°F73°F7.4"
      September54°F78°F65°F8.9"
      October44°F66°F54°F5.8"
      November32°F52°F41°F4.0"
      December22°F37°F29°F4.5"

      Knoxville 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.
      IndexKnoxvilleIllinoisNational
      Air quality index414142
      Pollution index1,709,2303,148,6942,726,193

      Knoxville air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality285
      Days with moderate air quality78
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Knoxville air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.050%
      Carbon Tetrachloride0.040%
      Lead0.001%
      Mercury0.001%

      Average monthly Knoxville temperature with heat index

      Knoxville monthly precipitation with daily maximum

      Knoxville monthly snow depth with daily maximum

      Knoxville monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Oak Run, IL4684118.0%
      Gilson, IL1944118.0%
      Farmington, IL1,9394118.0%
      London Mills, IL3264118.0%
      Williamsfield, IL5094118.0%
      Knoxville, IL3,1374118.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Blanchard, LA3,1373922.0%
      Mamou, LA3,1374118.0%
      Elgin, OK3,1374314.0%
      Milbank, SD3,1372550.0%
      Zillah, WA3,1373824.0%
      Knoxville, IL3,1374118.0%
      Source: The Knoxville, 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.