TODAY FEB28
TEMPERATURE52
HUMIDITY100
PRESSURE29.84
WIND COND.150 14.8
  • 4829Mon
  • 5032Tue20%
  • 5833Wed
  • 5432Thu
  • 5231Fri
daynightWeather update from Sparta Community-Hunter Field Airport at

Key findings

  • The highest monthly average temperature in Percy for July is 78 degrees
  • The lowest monthly average temperature in Percy for January is 33 degrees
  • The most monthly precipitation in Percy occurs in August with 10.7 inches
  • The air quality index in Percy is 14% better than the national average
  • The pollution index in Percy is 89% better than the national average

Compare Percy, IL Weather

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      Percy 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
      January25°F42°F33°F4.6"
      February27°F45°F35°F2.4"
      March39°F58°F48°F3.7"
      April48°F69°F58°F6.6"
      May57°F77°F66°F10.0"
      June66°F86°F76°F8.8"
      July69°F88°F78°F6.8"
      August67°F87°F76°F10.7"
      September59°F81°F69°F7.4"
      October48°F70°F58°F9.0"
      November38°F57°F47°F6.5"
      December30°F45°F37°F7.7"

      Percy 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.
      IndexPercyIllinoisNational
      Air quality index434150
      Pollution index569,1783,347,2955,066,862

      Percy air quality information

      MeasurementTotal
      Days measured344
      Days with good air quality269
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Percy air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Percy temperature with heat index

      Percy monthly precipitation with daily maximum

      Percy monthly snow depth with daily maximum

      Percy monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Ava, IL6134314%
      Pinckneyville, IL5,4224314%
      Coulterville, IL9344314%
      Campbell Hill, IL3064314%
      Tilden, IL7634314%
      Percy, IL8034314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Angelica, NY8033530%
      Woods Bay, MT8033726%
      Avon, IL8034118%
      Houtzdale, PA8034118%
      Bardwell, KY8034412%
      Percy, IL8034314%
      Source: The Percy, 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.