TODAY MAR28
TEMPERATURE30
HUMIDITY79
PRESSURE102167.34
WIND COND.
  • 5434Thu20%
  • 6450Fri70%
  • 6539Sat80%20%
  • 5845Sun
  • 6338Mon
daynightWeather update from Pontiac Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Cornell for July is 74.7 degrees
  • The lowest monthly average temperature in Cornell for January is 26.6 degrees
  • The most monthly precipitation in Cornell occurs in July with 10.4 inches
  • The air quality index in Cornell is 100% better than the national average
  • The pollution index in Cornell is 184% worse than the national average

Compare Cornell, IL Weather

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      Cornell 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
      January19°F35°F27°F3.7"
      February20°F37°F28°F2.9"
      March33°F52°F41°F4.7"
      April42°F66°F53°F5.6"
      May54°F76°F64°F6.5"
      June63°F84°F73°F7.6"
      July65°F85°F75°F10.4"
      August62°F83°F72°F7.8"
      September55°F79°F66°F7.6"
      October44°F66°F54°F4.3"
      November34°F53°F42°F5.5"
      December24°F39°F31°F3.5"

      Cornell 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.
      IndexCornellIllinoisNational
      Air quality index04142
      Pollution index7,745,2003,148,6942,726,193

      Cornell 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

      Cornell air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.070%
      Carbon Tetrachloride0.020%
      Lead0.860%
      Mercury0.210%

      Average monthly Cornell temperature with heat index

      Cornell monthly precipitation with daily maximum

      Cornell monthly snow depth with daily maximum

      Cornell monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Dana, IL990100.0%
      Leonore, IL1350100.0%
      Long Point, IL2500100.0%
      Ransom, IL3550100.0%
      Kangley, IL2440100.0%
      Cornell, IL4280100.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Cushman, AR4283628.0%
      Robbins, CA4284412.0%
      Breda, IA4283726.0%
      Brooklyn, IL428548.0%
      Linn, KS4283236.0%
      Cornell, IL4280100.0%
      Source: The Cornell, 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.