TODAY MAY15
TEMPERATURE62
HUMIDITY44
PRESSURE30.16
WIND COND.150 11.2
  • 6355Sat80%20%
  • 7061Sun40%80%
  • 7361Mon70%60%
  • 7362Tue40%40%
  • 7765Wed40%60%
daynightWeather update from Quincy Regional Airport-Baldwin Field at

Key findings

  • 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 18% better than the national average
  • The pollution index in Mendon is 21% better 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 index414150
      Pollution index3,988,7103,347,2955,066,862

      Mendon air quality information

      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

      Mendon air quality information

      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

      City, StatePopulationAir Quality IndexNational Avg.
      Liberty, IL5044118%
      Quincy, IL40,6894118%
      Coatsburg, IL1554118%
      West Point, IL1974118%
      Bowen, IL4704118%
      Mendon, IL9354118%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Blue Hill, NE9351962%
      Eldorado Springs, CO935476%
      Granite, UT935512%
      Wilton, NH9353726%
      Benson, UT9354412%
      Mendon, IL9354118%
      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.