TODAY FEB26
TEMPERATURE31
HUMIDITY78
PRESSURE30.21
WIND COND.110 7.6
  • 5236Fri40%
  • 6044Sat20%
  • 5527Sun
  • 5029Mon
  • 5034Tue20%
daynightWeather update from St. Charles, St. Charles County Smartt Airport at

Key findings

  • The highest monthly average temperature in Jerseyville for August is 79 degrees
  • The lowest monthly average temperature in Jerseyville for December is 32 degrees
  • The most monthly precipitation in Jerseyville occurs in January with 9 inches
  • The air quality index in Jerseyville is 9% worse than the national average
  • The pollution index in Jerseyville is 75% worse than the national average

Compare Jerseyville, IL Weather

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      Jerseyville 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
      January26°F41°F33°F9.0"
      February25°F43°F33°F4.8"
      March36°F60°F47°F3.9"
      April44°F68°F55°F4.3"
      May56°F80°F67°F4.3"
      June65°F87°F76°F5.8"
      July66°F89°F77°F3.9"
      August69°F91°F79°F4.6"
      September60°F85°F71°F4.9"
      October48°F71°F59°F3.7"
      November36°F58°F46°F7.6"
      December25°F40°F32°F2.5"

      Jerseyville 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.
      IndexJerseyvilleIllinoisNational
      Air quality index544150
      Pollution index8,870,2303,347,2955,066,862

      Jerseyville 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

      Jerseyville air quality information

      PollutantTotal
      Arsenic0.180%
      Benzene0.060%
      Carbon Tetrachloride0.020%
      Lead0.030%
      Mercury0.120%

      Average monthly Jerseyville temperature with heat index

      Jerseyville monthly precipitation with daily maximum

      Jerseyville monthly snow depth with daily maximum

      Jerseyville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Chesterfield, IL3364020%
      Rockbridge, IL162548%
      Medora, IL449548%
      Grafton, IL688548%
      Bethalto, IL9,364548%
      Jerseyville, IL8,502548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Itasca, IL8,5025510%
      Palm Beach, FL8,5013628%
      Live Oak city, CA8,5013530%
      Winchester, TN8,5044412%
      Signal Mountain, TN8,500468%
      Jerseyville, IL8,502548%
      Source: The Jerseyville, 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.