The tables give the normal maximum and minimum yearly temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center. You can jump to a separate table for each region of the state: Chicago Area, Northern Illinois, Central Illinois and Southern Illinois.
Aerotek Inc. was founded in 1983 and is headquartered in Hanover, Maryland with office locations in Puerto Rico, Canada, the United Kingdom, Germany, and the Netherlands. Aerotek Inc. operates as a subsidiary of Allegis Group, Inc.
Aero Commander was an aircraft manufacturer formed in 1944. In subsequent years it became a subsidiary of Rockwell International and Gulfstream Aerospace. The company ceased aircraft production in 1986.