TODAY JUN04
TEMPERATURE72
HUMIDITY88
PRESSURE29.87
WIND COND.210 11.4
  • 9171Fri20%20%
  • 9065Sat30%
  • 8764Sun
  • 8972Mon
  • 8668Tue
daynightWeather update from Marion - Williamson County Regional Airport at
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Marion 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
January27°F44°F35°F2.5"
February29°F46°F37°F1.6"
March40°F59°F49°F4.1"
April50°F70°F59°F10.7"
May58°F78°F68°F10.5"
June67°F87°F77°F13.3"
July70°F88°F79°F0.5"
August68°F88°F77°F0.4"
September61°F81°F70°F1.2"
October50°F70°F59°F0.8"
November39°F58°F48°F5.8"
December32°F47°F39°F1.2"

Did you know?

  • The highest monthly average temperature in Marion for July is 79 degrees.
  • The lowest monthly average temperature in Marion for January is 35 degrees.
  • The most monthly precipitation in Marion occurs in June with 13.3 inches.
  • The air quality index in Marion is 22% better than the national average.
  • The pollution index in Marion is 98% better than the national average.

Compare Marion, IL Weather To Other Cities

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      Marion 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.
      IndexMarionIllinoisNational
      Air quality index394150
      Pollution index125,3593,347,2955,066,862

      Marion air quality information

      MeasurementTotal
      Days measured243
      Days with good air quality204
      Days with moderate air quality39
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Marion air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.003%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Marion temperature with heat index

      Marion monthly precipitation with daily maximum

      Marion monthly snow depth with daily maximum

      Marion monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Goreville, IL1,1783628%
      New Burnside, IL2073628%
      Creal Springs, IL3893628%
      Stonefort, IL4203628%
      Bush, IL2443922%
      Marion, IL17,7033922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Martha Lake, WA17,703492%
      Tiffin, OH17,7013628%
      Hannibal, MO17,7073432%
      Wahiawa, HI17,6963040%
      Glenvar Heights, FL17,6874118%
      Marion, IL17,7033922%
      Source: The Marion, 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.