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Key findings

  • The highest monthly average temperature in Sparta for July is 78 degrees
  • The lowest monthly average temperature in Sparta for January is 33 degrees
  • The most monthly precipitation in Sparta occurs in August with 10.7 inches
  • The air quality index in Sparta is 9% worse than the national average
  • The pollution index in Sparta is 76% better than the national average

Compare Sparta, IL Weather

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      Sparta 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"

      Sparta 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.
      IndexSpartaIllinoisNational
      Air quality index544150
      Pollution index1,232,9203,347,2955,066,862

      Sparta air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Sparta air quality information

      PollutantTotal
      Arsenic0.170%
      Benzene0.030%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.290%

      Average monthly Sparta temperature with heat index

      Sparta monthly precipitation with daily maximum

      Sparta monthly snow depth with daily maximum

      Sparta monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Oakdale, IL1814314%
      Willisville, IL5484314%
      Cutler, IL4074314%
      Coulterville, IL9344314%
      Campbell Hill, IL3064314%
      Sparta, IL4,378548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Captain Cook, HI4,3781668%
      Tiptonville, TN4,3782648%
      Whitehouse, OH4,3784020%
      Broad Brook, CT4,3774118%
      Empire, CA4,379492%
      Sparta, IL4,378548%
      Source: The Sparta, 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.