TODAY AUG15
TEMPERATURE82
HUMIDITY63
PRESSURE29.98
WIND COND.
  • 7969Wed60%70%
  • 8167Thu60%50%
  • 8467Fri50%
  • 8266Sat
  • 8367Sun
daynightWeather update from Mattoon / Charleston, Coles County Memorial Airport at

Lerna Average Weather

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 25% better than the national average.
  • The pollution index in Lerna is 67% better than the national average.

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Compare Lerna, IL Weather To Other Cities

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%
Charleston, IL21,2573726%
Jewett, IL2263726%
Toledo, IL1,3723726%
Gays, IL2933726%
Lerna, IL2723726%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Vaughnsville, OH2723040%
Partridge, KS2723922%
Taylor, MS2723334%
Rockford Bay, ID2723922%
Woody Creek, CO2724118%
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.