TODAY MAR19
TEMPERATURE27
HUMIDITY67
PRESSURE102130
WIND COND.
  • 6035Tue
  • 5529Wed
  • 4835Thu
  • 5734Fri
  • 5132Sat
daynightWeather update from Olney-Noble Airport at
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Weather Quick Facts

  • The highest monthly average temperature in West Salem for July is 76.4 degrees
  • The lowest monthly average temperature in West Salem for January is 32.3 degrees
  • The most monthly precipitation in West Salem occurs in April with 9.5 inches
  • The air quality index in West Salem is 14% better than the national average
  • The pollution index in West Salem is 82% better than the national average

Compare West Salem, IL Weather

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      West Salem 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
      January25°F41°F32°F3.3"
      February27°F43°F34°F2.1"
      March38°F57°F46°F4.7"
      April48°F70°F58°F9.5"
      May58°F78°F67°F4.8"
      June66°F86°F75°F2.2"
      July67°F87°F76°F8.0"
      August65°F86°F75°F1.7"
      September57°F81°F68°F5.4"
      October47°F70°F57°F1.8"
      November37°F56°F45°F6.7"
      December30°F44°F36°F2.5"

      West Salem 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.
      IndexWest SalemIllinoisNational
      Air quality index364142
      Pollution index500,0043,148,6942,726,193

      West Salem air quality information

      MeasurementTotal
      Days measured359
      Days with good air quality328
      Days with moderate air quality31
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      West Salem air quality information

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

      Average monthly West Salem temperature with heat index

      West Salem monthly precipitation with daily maximum

      West Salem monthly snow depth with daily maximum

      West Salem monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Parkersburg, IL2233628.0%
      Keensburg, IL1113628.0%
      Olney, IL8,8723628.0%
      Bone Gap, IL1513628.0%
      Calhoun, IL1493628.0%
      West Salem, IL8723628.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Cameron, AZ8724510.0%
      Parker Strip, AZ8721374.0%
      Crystal Springs, FL8723628.0%
      Overbrook, KS8724118.0%
      Adairville, KY8724020.0%
      West Salem, IL8723628.0%
      Source: The West Salem, 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.