TODAY NOV22
TEMPERATURE42
HUMIDITY58
PRESSURE101690
WIND COND.300 22.3
  • 4832Fri
  • 5338Sat
  • 6352Sun30%
  • 6330Mon40%
  • 4632Tue30%
daynightWeather update from Sparta Community-Hunter Field Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Percy for July is 78 degrees
  • The lowest monthly average temperature in Percy for January is 32.9 degrees
  • The most monthly precipitation in Percy occurs in August with 10.7 inches
  • The air quality index in Percy is 2% worse than the national average
  • The pollution index in Percy is 79% 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 index434142
      Pollution index569,1783,148,6942,726,193

      Percy air quality

      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

      Air quality details

      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

      CityPopulationAir Quality IndexNational Avg.
      Campbell Hill, IL2924314.0%
      Tilden, IL9614314.0%
      Rockwood, IL254314.0%
      Steeleville, IL1,8704314.0%
      Cutler, IL4294314.0%
      Percy, IL1,1104314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Hotevilla-Bacavi, AZ1,1104510.0%
      Black Diamond, FL1,1103040.0%
      Johnson City, KS1,1101570.0%
      Algonquin, MD1,1104118.0%
      Grant, MI1,1103824.0%
      Percy, IL1,1104314.0%
      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.