TODAY MAY09
TEMPERATURE52
HUMIDITY83
PRESSURE29.79
WIND COND.100 20.5
  • 5938Sun100%
  • 6143Mon
  • 6142Tue
  • 6344Wed
  • 6447Thu20%
daynightWeather update from St. Louis Regional Airport at

Key findings

  • The highest monthly average temperature in Wilsonville for July is 75.9 degrees
  • The lowest monthly average temperature in Wilsonville for January is 29.4 degrees
  • The most monthly precipitation in Wilsonville occurs in April with 9.3 inches
  • The air quality index in Wilsonville is 9% worse than the national average
  • The pollution index in Wilsonville is 87% better than the national average

Compare Wilsonville, IL Weather

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      Wilsonville 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"

      Wilsonville 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.
      IndexWilsonvilleIllinoisNational
      Air quality index544150
      Pollution index647,2803,347,2955,066,862

      Wilsonville 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

      Wilsonville air quality information

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

      Average monthly Wilsonville temperature with heat index

      Wilsonville monthly precipitation with daily maximum

      Wilsonville monthly snow depth with daily maximum

      Wilsonville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Carlinville, IL5,2974020%
      Chesterfield, IL3364020%
      Litchfield, IL6,9764020%
      Shipman, IL594548%
      Staunton, IL4,895548%
      Wilsonville, IL658548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Independence, CA658476%
      Axtell, NE6581962%
      Paul Smiths, NY6580100%
      Holiday Lakes, OH6584118%
      Medora, IN6583530%
      Wilsonville, IL658548%
      Source: The Wilsonville, 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.