Williamson County Regional Airport is a public use airport located 7 km west of the central business district of Marion, in Williamson County, Illinois.
Humid continental climate (Köppen climate classification Dfa) - characterized by four seasons: cold, windy, snowy winters, mild springs, hot, humid summers, and crisp and relatively short autumns. Precipitation reaches its lowest in January and February and peaks in summer and latter half of spring.
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