Planting and Last Frost Dates, Maps

50:50 Last Freeze - DuPage = May 5
Latest freeze May 20*
50:50 First Freeze - DuPage = October 10*
Number of frost free days - DuPage = 170 - 180*
* From Gardening in DuPage County by Cynthia G. McCabe © 1995.

Maps from University of Illinois Extension Service.