TODAY MAR04
TEMPERATURE40
HUMIDITY79
PRESSURE30.3
WIND COND.90 18.4
  • 5029Fri
  • 5133Sat
  • 5942Sun
  • 6345Mon
  • 6554Tue
daynightWeather update from Macomb Municipal Airport at

Key findings

  • The highest monthly average temperature in Plymouth for July is 75 degrees
  • The lowest monthly average temperature in Plymouth for January is 26 degrees
  • The most monthly precipitation in Plymouth occurs in June with 10.8 inches
  • The air quality index in Plymouth is 42% better than the national average
  • The pollution index in Plymouth is 84% better than the national average

Compare Plymouth, IL Weather

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      Plymouth 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°F35°F26°F3.6"
      February19°F38°F27°F3.0"
      March33°F53°F42°F3.4"
      April43°F67°F54°F5.4"
      May53°F76°F64°F7.4"
      June63°F84°F73°F10.8"
      July65°F85°F75°F8.6"
      August63°F84°F73°F8.8"
      September55°F80°F66°F8.0"
      October44°F68°F55°F8.3"
      November33°F54°F42°F6.4"
      December23°F38°F30°F5.1"

      Plymouth 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.
      IndexPlymouthIllinoisNational
      Air quality index294150
      Pollution index802,1143,347,2955,066,862

      Plymouth air quality information

      MeasurementTotal
      Days measured120
      Days with good air quality101
      Days with moderate air quality19
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Plymouth air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Plymouth temperature with heat index

      Plymouth monthly precipitation with daily maximum

      Plymouth monthly snow depth with daily maximum

      Plymouth monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Basco, IL852942%
      Colchester, IL1,4922942%
      Bentley, IL202942%
      Carthage, IL2,5132942%
      Macomb, IL18,7712942%
      Plymouth, IL3832942%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Comfrey, MN3833236%
      Novinger, MO3834118%
      Rolling Hills, WY3834216%
      Ralston, OK3834020%
      South Toledo Bend, TX3833040%
      Plymouth, IL3832942%
      Source: The Plymouth, 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.