TODAY MAY18
TEMPERATURE65
HUMIDITY96
PRESSURE30.1
WIND COND.70 7.6
  • 7363Tue80%40%
  • 8064Wed30%20%
  • 8364Thu20%
  • 8365Fri20%
  • 8566Sat20%
daynightWeather update from Salem, Salem-Leckrone Airport at

Key findings

  • The highest monthly average temperature in Greenville for July is 75.9 degrees
  • The lowest monthly average temperature in Greenville for January is 29.4 degrees
  • The most monthly precipitation in Greenville occurs in April with 9.3 inches
  • The air quality index in Greenville is 14% better than the national average
  • The pollution index in Greenville is 87% better than the national average

Compare Greenville, IL Weather

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      Greenville 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
      January23°F38°F29°F3.3"
      February24°F40°F31°F3.5"
      March36°F55°F44°F3.9"
      April45°F67°F55°F9.3"
      May55°F75°F64°F5.6"
      June64°F84°F73°F7.9"
      July66°F86°F76°F5.0"
      August65°F86°F74°F5.1"
      September57°F80°F67°F6.0"
      October46°F68°F56°F5.6"
      November36°F54°F44°F3.6"
      December28°F42°F34°F3.6"

      Greenville 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.
      IndexGreenvilleIllinoisNational
      Air quality index434150
      Pollution index647,2803,347,2955,066,862

      Greenville air quality information

      MeasurementTotal
      Days measured344
      Days with good air quality269
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Greenville air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Greenville temperature with heat index

      Greenville monthly precipitation with daily maximum

      Greenville monthly snow depth with daily maximum

      Greenville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Coffeen, IL6084020%
      Smithboro, IL1714020%
      Mulberry Grove, IL6704020%
      Keyesport, IL4434314%
      Donnellson, IL176548%
      Greenville, IL6,8334314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Milford, OH6,833548%
      Winthrop Harbor, IL6,8323922%
      Barrington, NJ6,831512%
      Mountainside, NJ6,835512%
      Whitinsville, MA6,8314020%
      Greenville, IL6,8334314%
      Source: The Greenville, 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.