TODAY OCT07
TEMPERATURE47
HUMIDITY71
PRESSURE102130
WIND COND.310 11.2
  • 6742Mon
  • 7342Tue
  • 7544Wed
  • 7548Thu
  • 8253Fri
daynightWeather update from Rockford, Greater Rockford Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Winnebago for July is 74 degrees
  • The lowest monthly average temperature in Winnebago for January is 22.5 degrees
  • The most monthly precipitation in Winnebago occurs in August with 5.3 inches
  • The air quality index in Winnebago is equal to the national average
  • The pollution index in Winnebago is 37% better than the national average

Compare Winnebago, IL Weather

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      Winnebago 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°F32°F23°F1.7"
      February15°F35°F25°F1.6"
      March27°F50°F38°F2.7"
      April37°F64°F50°F4.3"
      May47°F75°F61°F3.4"
      June58°F84°F71°F5.1"
      July62°F86°F74°F4.9"
      August61°F84°F72°F5.3"
      September53°F79°F65°F2.8"
      October42°F66°F53°F2.9"
      November30°F51°F40°F2.4"
      December18°F36°F27°F2.5"

      Winnebago 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.
      IndexWinnebagoIllinoisNational
      Air quality index424142
      Pollution index1,721,0903,148,6942,726,193

      Winnebago 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%
      Benzene0.020%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly Winnebago temperature with heat index

      Winnebago monthly precipitation with daily maximum

      Winnebago monthly snow depth with daily maximum

      Winnebago monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rockford, IL147,4414216.0%
      Byron, IL3,6074216.0%
      Leaf River, IL5104216.0%
      Stillman Valley, IL1,3484216.0%
      Pecatonica, IL1,9574216.0%
      Winnebago, IL3,5394216.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Frontenac, MO3,538548.0%
      Marienville, PA3,538982.0%
      Northern Cambria, PA3,5383824.0%
      Pinch, WV3,5384020.0%
      Prestonsburg, KY3,5374216.0%
      Winnebago, IL3,5394216.0%
      Source: The Winnebago, 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.