TODAY MAY17
TEMPERATURE71
HUMIDITY70
PRESSURE30.12
WIND COND.110 9.4
  • 7062Tue60%50%
  • 8064Wed40%30%
  • 8265Thu
  • 8465Fri
  • 8464Sat
daynightWeather update from Effingham, Effingham County Memorial Airport at

Key findings

  • The highest monthly average temperature in Shelbyville for August is 75.9 degrees
  • The lowest monthly average temperature in Shelbyville for January is 29.5 degrees
  • The most monthly precipitation in Shelbyville occurs in November with 11.8 inches
  • The air quality index in Shelbyville is 20% better than the national average
  • The pollution index in Shelbyville is 53% better than the national average

Compare Shelbyville, IL Weather

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      Shelbyville 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
      January22°F38°F30°F1.7"
      February25°F40°F32°F2.3"
      March36°F54°F44°F1.1"
      April46°F67°F55°F4.3"
      May55°F76°F64°F0.0"
      June66°F86°F75°F3.0"
      July66°F86°F75°F7.9"
      August66°F87°F76°F4.8"
      September59°F81°F69°F8.6"
      October47°F69°F57°F1.4"
      November36°F56°F46°F11.8"
      December25°F38°F31°F7.1"

      Shelbyville 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.
      IndexShelbyvilleIllinoisNational
      Air quality index404150
      Pollution index2,357,2803,347,2955,066,862

      Shelbyville air quality information

      MeasurementTotal
      Days measured245
      Days with good air quality224
      Days with moderate air quality21
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Shelbyville air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.030%
      Carbon Tetrachloride0.004%
      Lead0.010%
      Mercury0.000%

      Average monthly Shelbyville temperature with heat index

      Shelbyville monthly precipitation with daily maximum

      Shelbyville monthly snow depth with daily maximum

      Shelbyville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Windsor village, IL9654020%
      Stewardson, IL7194020%
      Tower Hill, IL5994020%
      Windsor, IL1,4604020%
      Strasburg, IL5014020%
      Shelbyville, IL5,1474020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Gilmer, TX5,1483726%
      Springhill, LA5,1493922%
      Big Bear Lake, CA5,1498978%
      Birdsboro, PA5,1454216%
      East Freehold, NJ5,1434118%
      Shelbyville, IL5,1474020%
      Source: The Shelbyville, 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.