TODAY APR23
TEMPERATURE42
HUMIDITY62
PRESSURE30.1
WIND COND.160 7.6
  • 5839Sat80%20%
  • 5941Sun
  • 7559Mon
  • 8160Tue
  • 7250Wed
daynightWeather update from Pontiac Municipal Airport at

Key findings

  • The highest monthly average temperature in Forrest for July is 74.7 degrees
  • The lowest monthly average temperature in Forrest for January is 26.6 degrees
  • The most monthly precipitation in Forrest occurs in July with 10.4 inches
  • The air quality index in Forrest is 12% better than the national average
  • The pollution index in Forrest is 53% worse than the national average

Compare Forrest, IL Weather

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      Forrest 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"

      Forrest 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.
      IndexForrestIllinoisNational
      Air quality index444150
      Pollution index7,745,2003,347,2955,066,862

      Forrest air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality256
      Days with moderate air quality108
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Forrest air quality information

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

      Average monthly Forrest temperature with heat index

      Forrest monthly precipitation with daily maximum

      Forrest monthly snow depth with daily maximum

      Forrest monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Cullom, IL5950100%
      Kempton, IL1500100%
      Saunemin, IL3310100%
      Melvin, IL5504216%
      Roberts, IL3744216%
      Forrest, IL1,0834412%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Coyne Center, IL1,083468%
      Molino, FL1,0834118%
      Laurel, NY1,0834118%
      Atwater, MN1,0833236%
      Bon Aqua Junction, TN1,0833138%
      Forrest, IL1,0834412%
      Source: The Forrest, 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.