Frost/Freeze in Massac, Illinois

Widespread freeze and frost brought an end to the growing season for many locations that did not experience patchy sub-freezing temperatures on the morning of the 16th. Low temperatures in Southern Illinois fell to 28-32 degrees; however, locations near the Wabash Valley remained above freezing, causing the first freeze to fall outside the defined growing season. High pressure had moved directly over the region allowing for clear skies and calm winds.