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Key findings

  • The highest monthly average temperature in Petersburg for July is 77 degrees
  • The lowest monthly average temperature in Petersburg for January is 29 degrees
  • The most monthly precipitation in Petersburg occurs in June with 5.5 inches
  • The air quality index in Petersburg is 20% better than the national average
  • The pollution index in Petersburg is 92% better than the national average

Compare Petersburg, IL Weather

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      Petersburg 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
      January20°F38°F29°F2.1"
      February22°F41°F31°F1.9"
      March34°F56°F44°F2.9"
      April44°F68°F56°F4.3"
      May54°F77°F65°F4.5"
      June64°F86°F74°F5.5"
      July66°F88°F77°F4.3"
      August64°F86°F75°F3.2"
      September57°F81°F68°F3.7"
      October46°F69°F56°F3.7"
      November36°F55°F45°F2.5"
      December26°F41°F33°F2.8"

      Petersburg 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.
      IndexPetersburgIllinoisNational
      Air quality index404150
      Pollution index400,9053,347,2955,066,862

      Petersburg air quality information

      MeasurementTotal
      Days measured360
      Days with good air quality287
      Days with moderate air quality73
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Petersburg air quality information

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

      Average monthly Petersburg temperature with heat index

      Petersburg monthly precipitation with daily maximum

      Petersburg monthly snow depth with daily maximum

      Petersburg monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Pleasant Plains, IL8644020%
      Tallula, IL4924020%
      Greenview, IL8444020%
      New Holland, IL1874020%
      Oakford, IL2984020%
      Petersburg, IL2,3334020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ellinwood, KS2,3324020%
      Freeport, FL2,3323138%
      Rangely, CO2,331492%
      Kure Beach, NC2,3353432%
      Inez, TX2,3353138%
      Petersburg, IL2,3334020%
      Source: The Petersburg, 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.