TODAY AUG19
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 8670Sun
  • 8266Mon70%70%
  • 7858Tue
  • 7757Wed
  • 8160Thu
daynightWeather update from Jacksonville Municipal Airport at

Jacksonville Average Weather

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
January21°F39°F29°F3.2"
February22°F41°F31°F2.9"
March35°F56°F44°F3.7"
April44°F68°F55°F6.8"
May55°F76°F65°F5.2"
June64°F85°F74°F8.0"
July66°F87°F76°F5.2"
August64°F85°F74°F6.3"
September57°F80°F68°F6.6"
October46°F68°F56°F3.3"
November36°F55°F45°F5.0"
December26°F41°F33°F5.3"

Did you know?

  • The highest monthly average temperature in Jacksonville for July is 76 degrees.
  • The lowest monthly average temperature in Jacksonville for January is 29 degrees.
  • The most monthly precipitation in Jacksonville occurs in June with 8 inches.
  • The air quality index in Jacksonville is 29% better than the national average.
  • The pollution index in Jacksonville is 90% better than the national average.

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Compare Jacksonville, IL Weather To Other Cities

Jacksonville 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.
IndexJacksonvilleIllinoisNational
Air quality index354150
Pollution index479,4233,347,2955,066,862

Jacksonville air quality information

MeasurementTotal
Days measured365
Days with good air quality316
Days with moderate air quality49
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Jacksonville air quality information

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

Average monthly Jacksonville temperature with heat index

Jacksonville monthly precipitation with daily maximum

Jacksonville monthly snow depth with daily maximum

Jacksonville monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Chapin, IL4793530%
Glasgow, IL1743530%
South Jacksonville, IL3,2723530%
Alsey, IL1843530%
Concord, IL1673530%
Jacksonville, IL19,0423530%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Pinole, CA19,0404314%
Montgomery, IL19,055198%
Sherrelwood, CO19,029548%
Bonney Lake, WA19,022492%
Alamo, TX19,0213628%
Jacksonville, IL19,0423530%
Source: The Jacksonville, 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.