National Weather Service United States Department of Commerce

While we get into the spring planting season, it is important to remember that freezing temperatures typically occur well into April over central and southeast Illinois.  Much of the area will usually see the last freeze around mid April, with hard freezes (lows of 28°F or colder) still possible through the first several days of the month.  

The following graphics are courtesy of the Midwestern Regional Climate Center in Champaign.

Observed date of first freeze this season. Image courtesy MRCC

Observed date of first hard freeze (28 degrees or colder). Image courtesy MRCC

Average date of first freeze. Image courtesy MRCC

Average date of first hard freeze (28 deg.)  Image courtesy MRCC