Description

St. Louis Downtown Airport is a public-use airport located in the St. Louis Metropolitan Area, 2 km east of the central business district of Cahokia, in St. Clair County, Illinois, United States.

The St. Louis metropolitan area is also served by Lambert-St. Louis International Airport in St. Louis, Missouri; MidAmerica St. Louis Airport in Belleville, Illinois; St. Louis Regional Airport in Alton, Illinois; and Spirit of St. Louis Airport in Chesterfield, Missouri.

Climatology

St. Louis lies in the transition between a humid subtropical and humid continental climate (Köppen climate classification Cfa/Dfa), with neither large mountains nor large bodies of water to moderate its temperature. It is subject to both cold Arctic air and hot, humid tropical air from the Gulf of Mexico. Spring is the wettest season and produces erratic severe weather ranging from tornadoes to winter storms. Summers are hot and humid. Winters are cold with periodic snow and temperatures often below freezing. Winter storm systems, can bring days of heavy freezing rain, ice pellets, and snowfall.