TODAY MAR19
TEMPERATURE31
HUMIDITY66
PRESSURE102370
WIND COND.
  • 6235Tue
  • 5030Wed
  • 4536Thu
  • 5735Fri20%20%
  • 5237Sat
daynightWeather update from Salem, Salem-Leckrone Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Smithboro for July is 75.9 degrees
  • The lowest monthly average temperature in Smithboro for January is 29.4 degrees
  • The most monthly precipitation in Smithboro occurs in April with 9.3 inches
  • The air quality index in Smithboro is 5% better than the national average
  • The pollution index in Smithboro is 76% better than the national average

Compare Smithboro, IL Weather

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      Smithboro 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
      January23°F38°F29°F3.3"
      February24°F40°F31°F3.5"
      March36°F55°F44°F3.9"
      April45°F67°F55°F9.3"
      May55°F75°F64°F5.6"
      June64°F84°F73°F7.9"
      July66°F86°F76°F5.0"
      August65°F86°F74°F5.1"
      September57°F80°F67°F6.0"
      October46°F68°F56°F5.6"
      November36°F54°F44°F3.6"
      December28°F42°F34°F3.6"

      Smithboro 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.
      IndexSmithboroIllinoisNational
      Air quality index404142
      Pollution index647,2803,148,6942,726,193

      Smithboro air quality information

      MeasurementTotal
      Days measured245
      Days with good air quality224
      Days with moderate air quality21
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Smithboro air quality information

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

      Average monthly Smithboro temperature with heat index

      Smithboro monthly precipitation with daily maximum

      Smithboro monthly snow depth with daily maximum

      Smithboro monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Coffeen, IL6404020.0%
      Mulberry Grove, IL8474020.0%
      Vandalia, IL6,6154020.0%
      Vernon, IL944314.0%
      Greenville, IL6,7254314.0%
      Smithboro, IL2154020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Burdette, AR2152648.0%
      Bombay Beach, CA2155816.0%
      Fort Washington, CA2156020.0%
      Rickardsville, IA2152942.0%
      Rockbridge, IL215548.0%
      Smithboro, IL2154020.0%
      Source: The Smithboro, 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.