TODAY MAR09
TEMPERATURE42
HUMIDITY73
PRESSURE30.29
WIND COND.90 13
  • 7055
  • 6759Wed20%20%
  • 6745Thu80%60%
  • 5640Fri40%70%
  • 4936Sat40%30%
daynightWeather update from St. Charles, St. Charles County Smartt Airport at

Key findings

  • The highest monthly average temperature in Hardin for August is 79 degrees
  • The lowest monthly average temperature in Hardin for December is 32 degrees
  • The most monthly precipitation in Hardin occurs in January with 9 inches
  • The air quality index in Hardin is 9% worse than the national average
  • The pollution index in Hardin is 51% better than the national average

Compare Hardin, IL Weather

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      Hardin 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
      January26°F41°F33°F9.0"
      February25°F43°F33°F4.8"
      March36°F60°F47°F3.9"
      April44°F68°F55°F4.3"
      May56°F80°F67°F4.3"
      June65°F87°F76°F5.8"
      July66°F89°F77°F3.9"
      August69°F91°F79°F4.6"
      September60°F85°F71°F4.9"
      October48°F71°F59°F3.7"
      November36°F58°F46°F7.6"
      December25°F40°F32°F2.5"

      Hardin 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.
      IndexHardinIllinoisNational
      Air quality index544150
      Pollution index2,458,1803,347,2955,066,862

      Hardin air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Hardin air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.020%
      Carbon Tetrachloride0.001%
      Lead0.120%
      Mercury0.330%

      Average monthly Hardin temperature with heat index

      Hardin monthly precipitation with daily maximum

      Hardin monthly snow depth with daily maximum

      Hardin monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Paynesville, MO684118%
      Kampsville, IL310548%
      Fieldon, IL173548%
      Grafton, IL688548%
      Brussels, IL123548%
      Hardin, IL877548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Crab Orchard, KY8773334%
      Mashpee Neck, MA8773628%
      Bellaire, MI8773628%
      Keystone, CO877476%
      Kimball, MN8773236%
      Hardin, IL877548%
      Source: The Hardin, 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.