TODAY JUN04
TEMPERATURE82
HUMIDITY54
PRESSURE29.79
WIND COND.230 8.1
  • 9067Fri30%
  • 8562Sat
  • 8464Sun
  • 8770Mon
  • 8667Tue
daynightWeather update from Jacksonville Municipal Airport at
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Winchester 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
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 Winchester for July is 76 degrees.
  • The lowest monthly average temperature in Winchester for January is 29 degrees.
  • The most monthly precipitation in Winchester occurs in June with 8 inches.
  • The air quality index in Winchester is 30% better than the national average.
  • The pollution index in Winchester is 77% better than the national average.

Compare Winchester, IL Weather To Other Cities

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      Winchester 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.
      IndexWinchesterIllinoisNational
      Air quality index354150
      Pollution index1,150,6703,347,2955,066,862

      Winchester 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

      Winchester air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.030%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Winchester temperature with heat index

      Winchester monthly precipitation with daily maximum

      Winchester monthly snow depth with daily maximum

      Winchester monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Detroit, IL1093432%
      Griggsville, IL1,3253432%
      Naples, IL593432%
      Time, IL93432%
      Bluffs, IL7343432%
      Winchester, IL1,6363530%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Oriole Beach, FL1,6364020%
      Fontana-on-Geneva Lake, WI1,6363628%
      Seaside Park, NJ1,6354020%
      Beech Mountain Lakes, PA1,6354020%
      Green Springs, OH1,6373628%
      Winchester, IL1,6363530%
      Source: The Winchester, 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.