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Key findings

  • The highest monthly average temperature in Fairmont for July is 73.4 degrees
  • The lowest monthly average temperature in Fairmont for January is 24.4 degrees
  • The most monthly precipitation in Fairmont occurs in August with 7.7 inches
  • The air quality index in Fairmont is 11% worse than the national average
  • The pollution index in Fairmont is 69% better than the national average

Compare Fairmont, IL Weather

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      Fairmont 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°F32°F24°F3.1"
      February18°F34°F26°F3.0"
      March31°F49°F39°F5.2"
      April40°F62°F50°F4.8"
      May51°F73°F61°F5.9"
      June60°F82°F70°F6.7"
      July64°F84°F73°F4.1"
      August62°F82°F71°F7.7"
      September55°F76°F65°F3.2"
      October44°F64°F53°F7.3"
      November33°F50°F41°F3.9"
      December22°F36°F29°F3.7"

      Fairmont 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.
      IndexFairmontIllinoisNational
      Air quality index554150
      Pollution index1,558,0703,347,2955,066,862

      Fairmont air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality121
      Days with moderate air quality227
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality1

      Fairmont air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.010%
      Carbon Tetrachloride0.070%
      Lead0.090%
      Mercury0.010%

      Average monthly Fairmont temperature with heat index

      Fairmont monthly precipitation with daily maximum

      Fairmont monthly snow depth with daily maximum

      Fairmont monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Shorewood, IL16,5390100%
      Minooka, IL11,7860100%
      Oswego, IL33,2450100%
      Elwood, IL2,1440100%
      Channahon, IL12,3290100%
      Fairmont, IL2,5165510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Marysville, PA2,5164412%
      Marked Tree, AR2,5164510%
      Eminence, KY2,515492%
      Belleville, WI2,5153922%
      Guilford Center, CT2,5174118%
      Fairmont, IL2,5165510%
      Source: The Fairmont, 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.