TODAY MAY10
TEMPERATURE42
HUMIDITY66
PRESSURE30.07
WIND COND.60 7.6
  • 5531Mon20%
  • 5834Tue
  • 6439Wed
  • 6643Thu
  • 6748Fri
daynightWeather update from Burlington Municipal Airport at

Key findings

  • The highest monthly average temperature in Harvard for July is 70.3 degrees
  • The lowest monthly average temperature in Harvard for January is 21.9 degrees
  • The most monthly precipitation in Harvard occurs in July with 11.4 inches
  • The air quality index in Harvard is 16% better than the national average
  • The pollution index in Harvard is 97% better than the national average

Compare Harvard, IL Weather

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      Harvard 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
      January14°F30°F22°F2.3"
      February14°F31°F23°F2.8"
      March26°F45°F35°F3.7"
      April36°F58°F46°F5.9"
      May46°F71°F58°F4.8"
      June56°F79°F67°F7.8"
      July59°F82°F70°F11.4"
      August57°F81°F68°F5.4"
      September50°F74°F61°F7.1"
      October40°F61°F50°F5.8"
      November29°F48°F38°F5.2"
      December19°F34°F27°F3.3"

      Harvard 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.
      IndexHarvardIllinoisNational
      Air quality index424150
      Pollution index151,0963,347,2955,066,862

      Harvard air quality information

      MeasurementTotal
      Days measured341
      Days with good air quality240
      Days with moderate air quality100
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Harvard air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.002%
      Carbon Tetrachloride0.000%
      Lead0.010%
      Mercury0.000%

      Average monthly Harvard temperature with heat index

      Harvard monthly precipitation with daily maximum

      Harvard monthly snow depth with daily maximum

      Harvard monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Hebron, IL1,2883726%
      Bloomfield, WI4,7003726%
      Como, WI2,4433726%
      Lake Geneva, WI7,7543726%
      Williams Bay, WI2,6053726%
      Harvard, IL9,5894216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Rainbow City, AL9,5904314%
      Hackettstown, NJ9,5853432%
      Silverton, OR9,5853236%
      Bristol, PA9,5934118%
      Aiea, HI9,5943040%
      Harvard, IL9,5894216%
      Source: The Harvard, 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.