TODAY MAY30
TEMPERATURE68
HUMIDITY53
PRESSURE30.19
WIND COND.360 8.1
  • 7151Sun
  • 7562Mon
  • 8868Tue
  • 8868Wed40%
  • 8567Thu
daynightWeather update from Mattoon / Charleston, Coles County Memorial Airport at
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Lerna 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
January21°F37°F28°F1.5"
February22°F39°F30°F1.7"
March35°F54°F44°F2.1"
April45°F66°F55°F4.9"
May55°F75°F64°F3.8"
June64°F84°F74°F4.7"
July66°F86°F75°F4.2"
August64°F85°F74°F2.1"
September57°F79°F67°F3.0"
October46°F67°F56°F2.9"
November35°F53°F44°F2.4"
December27°F41°F33°F2.4"

Did you know?

  • The highest monthly average temperature in Lerna for July is 75 degrees.
  • The lowest monthly average temperature in Lerna for January is 28 degrees.
  • The most monthly precipitation in Lerna occurs in April with 4.9 inches.
  • The air quality index in Lerna is 26% better than the national average.
  • The pollution index in Lerna is 67% better than the national average.

Compare Lerna, IL Weather To Other Cities

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      Lerna 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.
      IndexLernaIllinoisNational
      Air quality index374150
      Pollution index1,664,3703,347,2955,066,862

      Lerna air quality information

      MeasurementTotal
      Days measured214
      Days with good air quality201
      Days with moderate air quality13
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Lerna air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.030%
      Mercury0.003%

      Average monthly Lerna temperature with heat index

      Lerna monthly precipitation with daily maximum

      Lerna monthly snow depth with daily maximum

      Lerna monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Humboldt, IL4833628%
      Greenup, IL1,7383726%
      Neoga, IL1,7703726%
      Sigel, IL3493726%
      Charleston, IL21,2573726%
      Lerna, IL2723726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Woody Creek, CO2724118%
      St. Libory, NE272265430%
      Prescott, MI272285470%
      Taylor, MS2723334%
      Reading, KS2722354%
      Lerna, IL2723726%
      Source: The Lerna, 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.