TODAY DEC14
TEMPERATURE31
HUMIDITY78
PRESSURE102740
WIND COND.100 25.9
  • 4237Sat100%50%
  • 4741Sun20%
  • 5029Mon20%
  • 4631Tue
  • 3718Wed
daynightWeather update from Quincy Regional Airport-Baldwin Field at
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Weather Quick Facts

  • The highest monthly average temperature in Mendon for July is 75.9 degrees
  • The lowest monthly average temperature in Mendon for January is 27.5 degrees
  • The most monthly precipitation in Mendon occurs in June with 6 inches
  • The air quality index in Mendon is 3% better than the national average
  • The pollution index in Mendon is 46% worse than the national average

Compare Mendon, IL Weather

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      Mendon 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°F37°F28°F2.1"
      February21°F38°F29°F2.0"
      March34°F54°F43°F3.0"
      April44°F66°F55°F4.3"
      May54°F74°F63°F3.7"
      June64°F84°F74°F6.0"
      July66°F86°F76°F4.5"
      August66°F86°F75°F4.2"
      September57°F79°F67°F4.3"
      October45°F64°F54°F3.9"
      November36°F54°F44°F2.7"
      December23°F38°F29°F2.4"

      Mendon 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.
      IndexMendonIllinoisNational
      Air quality index414142
      Pollution index3,988,7103,148,6942,726,193

      Mendon air quality

      MeasurementTotal
      Days measured241
      Days with good air quality208
      Days with moderate air quality33
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.050%
      Carbon Tetrachloride0.010%
      Lead0.030%
      Mercury0.010%

      Average monthly Mendon temperature with heat index

      Mendon monthly precipitation with daily maximum

      Mendon monthly snow depth with daily maximum

      Mendon monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Coatsburg, IL1804118.0%
      West Point, IL2194118.0%
      Liberty, IL3984118.0%
      Quincy, IL40,1114118.0%
      Lima, IL1054118.0%
      Mendon, IL1,0924118.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Gun Club Estates, FL1,0923628.0%
      Jamestown, IN1,092548.0%
      Silver City, NC1,0924118.0%
      Poquott, NY1,0924314.0%
      Joseph, OR1,0922060.0%
      Mendon, IL1,0924118.0%
      Source: The Mendon, 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.