TODAY FEB25
TEMPERATURE36
HUMIDITY73
PRESSURE30.3
WIND COND.240 11.2
  • 4129Fri60%
  • 4330Sat
  • 4115Sun
  • 3420Mon
  • 4527Tue
daynightWeather update from Dubuque, Dubuque Regional Airport at

Key findings

  • The highest monthly average temperature in Hanover for July is 74 degrees
  • The lowest monthly average temperature in Hanover for January is 23 degrees
  • The most monthly precipitation in Hanover occurs in June with 8.9 inches
  • The air quality index in Hanover is 16% better than the national average
  • The pollution index in Hanover is 69% better than the national average

Compare Hanover, IL Weather

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      Hanover 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
      January15°F32°F23°F2.0"
      February16°F34°F25°F2.7"
      March31°F50°F39°F5.0"
      April41°F64°F51°F6.5"
      May51°F75°F62°F4.6"
      June61°F83°F71°F8.9"
      July64°F85°F74°F4.5"
      August61°F83°F72°F4.9"
      September54°F78°F65°F3.6"
      October43°F64°F53°F3.1"
      November32°F50°F40°F2.9"
      December20°F35°F28°F4.0"

      Hanover 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.
      IndexHanoverIllinoisNational
      Air quality index424150
      Pollution index1,592,9103,347,2955,066,862

      Hanover 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

      Hanover air quality information

      PollutantTotal
      Arsenic0.090%
      Benzene0.030%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.010%

      Average monthly Hanover temperature with heat index

      Hanover monthly precipitation with daily maximum

      Hanover monthly snow depth with daily maximum

      Hanover monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Apple Canyon Lake, IL3712942%
      St. Donatus, IA1392942%
      Elizabeth, IL7712942%
      Galena, IL3,4022942%
      The Galena Territory, IL1,2412942%
      Hanover, IL6834216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Naches, WA6833824%
      Lenkerville, PA6834412%
      Fifth Ward, LA6833040%
      Caledonia, OH6834118%
      Caddo Valley, AR6833236%
      Hanover, IL6834216%
      Source: The Hanover, 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.