TODAY MAY14
TEMPERATURE49
HUMIDITY66
PRESSURE30.33
WIND COND.
  • 6851Fri20%
  • 6452Sat70%30%
  • 7155Sun50%
  • 7554Mon50%
  • 7856Tue
daynightWeather update from Illinois Valley Regional Airport at

Key findings

  • The highest monthly average temperature in Dover for July is 75.2 degrees
  • The lowest monthly average temperature in Dover for January is 25.7 degrees
  • The most monthly precipitation in Dover occurs in August with 8.2 inches
  • The air quality index in Dover is 100% better than the national average
  • The pollution index in Dover is 59% better than the national average

Compare Dover, IL Weather

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      Dover 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°F34°F26°F3.3"
      February19°F35°F26°F3.0"
      March32°F51°F40°F4.3"
      April42°F64°F52°F7.2"
      May53°F75°F63°F8.0"
      June62°F83°F72°F7.5"
      July66°F85°F75°F7.1"
      August64°F83°F73°F8.2"
      September56°F78°F66°F6.3"
      October45°F65°F54°F6.6"
      November34°F51°F42°F4.3"
      December23°F37°F30°F3.5"

      Dover 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.
      IndexDoverIllinoisNational
      Air quality index04150
      Pollution index2,097,7403,347,2955,066,862

      Dover air quality information

      MeasurementTotal
      Days measured335
      Days with good air quality334
      Days with moderate air quality1
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Dover air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.060%
      Carbon Tetrachloride0.000%
      Lead0.001%
      Mercury0.300%

      Average monthly Dover temperature with heat index

      Dover monthly precipitation with daily maximum

      Dover monthly snow depth with daily maximum

      Dover monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      La Moille, IL8390100%
      Ohio, IL4700100%
      Dalzell, IL7190100%
      Mark, IL5300100%
      Hollowayville, IL520100%
      Dover, IL1710100%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Paradise Valley, NV1711472%
      Moscow, MD1713628%
      Broughton, IL1714314%
      Grand Marsh, WI1713530%
      Woodland, UT171468%
      Dover, IL1710100%
      Source: The Dover, 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.