TODAY NOV22
TEMPERATURE42
HUMIDITY89
PRESSURE101590
WIND COND.310 18.4
  • 4333Fri
  • 4232Sat
  • 5137Sun
  • 4321Mon
  • 3522Tue
daynightWeather update from Albertus Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Freeport for July is 71.8 degrees
  • The lowest monthly average temperature in Freeport for January is 21.7 degrees
  • The most monthly precipitation in Freeport occurs in August with 7.3 inches
  • The air quality index in Freeport is equal to the national average
  • The pollution index in Freeport is 35% better than the national average

Compare Freeport, IL Weather

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      Freeport 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
      January14°F30°F22°F2.9"
      February15°F31°F23°F2.3"
      March29°F47°F37°F3.6"
      April38°F61°F48°F5.4"
      May49°F72°F60°F5.5"
      June58°F80°F69°F6.3"
      July62°F82°F72°F5.8"
      August60°F81°F70°F7.3"
      September52°F75°F63°F4.7"
      October42°F62°F51°F5.8"
      November30°F48°F39°F4.0"
      December19°F33°F26°F3.4"

      Freeport 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.
      IndexFreeportIllinoisNational
      Air quality index424142
      Pollution index1,767,9803,148,6942,726,193

      Freeport air quality

      MeasurementTotal
      Days measured341
      Days with good air quality240
      Days with moderate air quality100
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.001%
      Benzene0.040%
      Carbon Tetrachloride0.010%
      Lead0.001%
      Mercury0.003%

      Average monthly Freeport temperature with heat index

      Freeport monthly precipitation with daily maximum

      Freeport monthly snow depth with daily maximum

      Freeport monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Winslow, IL3242942.0%
      Forreston, IL1,3924216.0%
      Shannon, IL7454216.0%
      Ridott, IL1704216.0%
      Orangeville, IL7974216.0%
      Freeport, IL23,9304216.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Kalispell, MT23,9353726.0%
      Port St. John, FL23,9403922.0%
      Ponca City, OK23,9404020.0%
      Saint-Lin--Laurentides, QC23,910n/a 
      South Plainfield, NJ23,961512.0%
      Freeport, IL23,9304216.0%
      Source: The Freeport, 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.