TODAY MAY14
TEMPERATURE68
HUMIDITY26
PRESSURE30.31
WIND COND.230 16.6
  • 6552Sat60%30%
  • 7356Sun40%
  • 7657Mon50%30%
  • 7760Tue30%
  • 7862Wed30%40%
daynightWeather update from Sterling Rockfalls at

Key findings

  • The highest monthly average temperature in Annawan for August is 73.3 degrees
  • The lowest monthly average temperature in Annawan for December is 23.1 degrees
  • The most monthly precipitation in Annawan occurs in August with 9.2 inches
  • The air quality index in Annawan is 16% better than the national average
  • The pollution index in Annawan is 65% better than the national average

Compare Annawan, IL Weather

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      Annawan 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
      January18°F33°F25°F2.9"
      February17°F32°F24°F2.5"
      March31°F52°F39°F4.5"
      April39°F65°F50°F6.4"
      May50°F76°F62°F3.5"
      June61°F86°F73°F6.1"
      July61°F86°F73°F7.8"
      August64°F85°F73°F9.2"
      September55°F82°F67°F3.9"
      October45°F69°F56°F1.9"
      November30°F52°F40°F4.2"
      December17°F31°F23°F1.5"

      Annawan 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.
      IndexAnnawanIllinoisNational
      Air quality index424150
      Pollution index1,753,5903,347,2955,066,862

      Annawan 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

      Annawan air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.070%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.001%

      Average monthly Annawan temperature with heat index

      Annawan monthly precipitation with daily maximum

      Annawan monthly snow depth with daily maximum

      Annawan monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Neponset, IL5544118%
      Buda, IL5954118%
      Sheffield, IL7364118%
      Kewanee, IL12,7554118%
      Atkinson, IL1,0354216%
      Annawan, IL9164216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      New London, MO9164118%
      Tolar, TX9163334%
      Loyalton, CA9164412%
      Silver Springs, NY9163726%
      Rock Island, WA9172452%
      Annawan, IL9164216%
      Source: The Annawan, 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.