TODAY MAR02
TEMPERATURE38
HUMIDITY62
PRESSURE30.13
WIND COND.200 22.3
  • 4628Wed
  • 4226Thu
  • 4627Fri
  • 4828Sat
  • 5337Sun
daynightWeather update from Aurora Municipal Airport at

Key findings

  • The highest monthly average temperature in Oswego for July is 73 degrees
  • The lowest monthly average temperature in Oswego for February is 23 degrees
  • The most monthly precipitation in Oswego occurs in July with 9.3 inches
  • The air quality index in Oswego is 100% better than the national average
  • The pollution index in Oswego is 63% better than the national average

Compare Oswego, IL Weather

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      Oswego 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
      January18°F32°F25°F4.1"
      February16°F31°F23°F3.2"
      March29°F48°F38°F3.7"
      April38°F62°F49°F5.9"
      May49°F74°F61°F4.0"
      June60°F84°F72°F4.6"
      July60°F85°F73°F9.3"
      August62°F83°F72°F8.2"
      September54°F81°F67°F2.4"
      October45°F68°F55°F5.0"
      November30°F49°F39°F3.4"
      December16°F31°F23°F2.7"

      Oswego 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.
      IndexOswegoIllinoisNational
      Air quality index04150
      Pollution index1,874,4903,347,2955,066,862

      Oswego air quality information

      MeasurementTotal
      Days measured335
      Days with good air quality334
      Days with moderate air quality1
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Oswego air quality information

      PollutantTotal
      Arsenic0.002%
      Benzene0.030%
      Carbon Tetrachloride0.010%
      Lead0.010%
      Mercury0.010%

      Average monthly Oswego temperature with heat index

      Oswego monthly precipitation with daily maximum

      Oswego monthly snow depth with daily maximum

      Oswego monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Millbrook, IL3410100%
      Lisbon, IL3970100%
      Plattville, IL2540100%
      Big Rock, IL1,1390100%
      Millington, IL6290100%
      Oswego, IL33,2450100%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Elk Grove Village, IL33,2515510%
      Wenatchee, WA33,2572452%
      Fair Lawn, NJ33,205512%
      Manitowoc, WI33,1833628%
      Menlo Park, CA33,3194314%
      Oswego, IL33,2450100%
      Source: The Oswego, 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.