TODAY APR19
TEMPERATURE46
HUMIDITY46
PRESSURE29.91
WIND COND.300 22.3
  • 4326Tue40%20%
  • 4627Wed
  • 5335Thu
  • 5541Fri40%
  • 5634Sat30%
daynightWeather update from Albertus Airport at

Key findings

  • The highest monthly average temperature in Shannon for July is 71.8 degrees
  • The lowest monthly average temperature in Shannon for January is 21.7 degrees
  • The most monthly precipitation in Shannon occurs in August with 7.3 inches
  • The air quality index in Shannon is 16% better than the national average
  • The pollution index in Shannon is 65% better than the national average

Compare Shannon, IL Weather

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      Shannon 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
      January14°F30°F22°F2.9"
      February15°F31°F23°F2.3"
      March29°F47°F37°F3.6"
      April38°F61°F48°F5.4"
      May49°F72°F60°F5.5"
      June58°F80°F69°F6.3"
      July62°F82°F72°F5.8"
      August60°F81°F70°F7.3"
      September52°F75°F63°F4.7"
      October42°F62°F51°F5.8"
      November30°F48°F39°F4.0"
      December19°F33°F26°F3.4"

      Shannon 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.
      IndexShannonIllinoisNational
      Air quality index424150
      Pollution index1,767,9803,347,2955,066,862

      Shannon air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality268
      Days with moderate air quality96
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Shannon air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.040%
      Carbon Tetrachloride0.010%
      Lead0.001%
      Mercury0.003%

      Average monthly Shannon temperature with heat index

      Shannon monthly precipitation with daily maximum

      Shannon monthly snow depth with daily maximum

      Shannon monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Stockton, IL1,8772942%
      German Valley, IL4864216%
      Milledgeville, IL1,0524216%
      Pearl City, IL8754216%
      Lanark, IL1,5424216%
      Shannon, IL6464216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Tropic, UT6464412%
      Ovid, NY6463432%
      Wade, NC6464118%
      Blackwells Mills, NJ6464118%
      Harmony, IN6464510%
      Shannon, IL6464216%
      Source: The Shannon, 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.