TODAY DEC15
TEMPERATURE31
HUMIDITY96
PRESSURE30.2
WIND COND.40 6.9
  • 4425Sat
  • 4525Sun
  • 3622Mon
  • 4028Tue
  • 4335Wed
daynightWeather update from Aurora Municipal Airport at

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Somonauk 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
January15°F32°F23°F1.5"
February16°F34°F24°F1.4"
March29°F49°F38°F2.3"
April39°F62°F50°F3.9"
May49°F73°F61°F4.3"
June59°F82°F70°F4.5"
July62°F84°F73°F4.3"
August60°F82°F71°F4.3"
September53°F77°F64°F2.9"
October42°F64°F52°F3.6"
November30°F50°F40°F2.1"
December20°F36°F28°F2.2"

Did you know?

  • The highest monthly average temperature in Somonauk for July is 73 degrees.
  • The lowest monthly average temperature in Somonauk for January is 23 degrees.
  • The most monthly precipitation in Somonauk occurs in June with 4.5 inches.
  • The air quality index in Somonauk is 97% better than the national average.
  • The pollution index in Somonauk is 63% better than the national average.

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Compare Somonauk, IL Weather To Other Cities

Somonauk 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.
IndexSomonaukIllinoisNational
Air quality index14150
Pollution index1,874,4903,347,2955,066,862

Somonauk air quality information

MeasurementTotal
Days measured351
Days with good air quality351
Days with moderate air quality
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Somonauk air quality information

PollutantTotal
Arsenic0.002%
Benzene0.030%
Carbon Tetrachloride0.010%
Lead0.010%
Mercury0.010%

Average monthly Somonauk temperature with heat index

Somonauk monthly precipitation with daily maximum

Somonauk monthly snow depth with daily maximum

Somonauk monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Kaneville, IL421198%
Lisbon, IL397198%
Plano, IL11,929198%
Sheridan, IL2,543198%
Big Rock, IL1,139198%
Somonauk, IL2,106198%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
New Eagle, PA2,1065612%
New Athens, IL2,1066020%
Knightstown, IN2,105365630%
Lexington, IL2,1073628%
Leetonia, OH2,1054510%
Somonauk, IL2,106198%
Source: The Somonauk, 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.