Information on Frost and Freeze in Central and Southeast Illinois

The average date of the first freeze (low temperatures of 32 degrees or colder) typically occurs between October 7th and 17th across central and southeast Illinois.  Areas along and south of I-70 generally are in the latter part of that range, as might be expected due to its more southerly location.  The first hard freeze, with lows of 28 degrees or colder, typically occur during the last 10 days of October, although some areas may not see this occur until early November. 

The map below, courtesy of the Midwestern Regional Climate Center in Champaign, shows where these freezes have occurred so far this autumn.  Additional maps are available at this link.

Locations that have experienced a freeze so far.  Image courtesy of the Midwestern Regional Climate Center.

 Specific climatology information is available in the images below.  These may be clicked to enlarge. 

Average date of first freeze in Illinois.  Image courtesy of Midwestern Regional Climate Center.

Average date of first hard freeze in Illinois.  Image courtesy of Midwestern Regional Climate Center.

Average date of first freeze (32 degrees).  Image courtesy of the Midwestern Regional Climate Center.

Average date of first hard freeze (28 degrees or colder).  Image courtesy of the Midwestern Regional Climate Center.

Average date of first freeze
(32 degrees) for Illinois.  Image courtesy of Illinois State Climatologist Office.

Average date of first hard freeze
(28 degrees) for Illinois.  Image courtesy of Illinois State Climatologist Office.

Average timing of first freeze (32 degrees). Image courtesy of MRCC.

Average timing of first hard freeze (28 degrees). Image courtesy of MRCC.

 



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