TODAY AUG19
TEMPERATURE63
HUMIDITY98
PRESSURE29.96
WIND COND.
  • 8266Mon70%50%
  • 7959Tue
  • 7856Wed
  • 8062Thu
  • 8266Fri
daynightWeather update from Jacksonville Municipal Airport at

Winchester 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 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 29% better than the national average.
  • The pollution index in Winchester is 77% better than the national average.

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Compare Winchester, IL Weather To Other Cities

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%
Meridian, TX1,6353334%
Coaling, AL1,6373040%
Seaside Park, NJ1,6354020%
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.