Frost and Freeze information
For Chicago... First Freeze of the Season Average Date: October 15th
Earliest Date: September 22, 1995 (32)
Latest Date: November 24, 1931 (30)
Last Spring Freeze of the Season
Average Date: April 23rd
Earliest Date: March 19, 1925 (28)
Latest Date: May 25, 1992 (32)
First Killing Frost (28 Degrees or Lower)
Average Date: October 27th
Earliest Date: October 2, 1974 (28)
Latest Date: December 3, 1899 (27)
For Rockford... First Freeze of the Season
Average Date: October 7th
Earliest Date: September 13, 1975 (32)
Latest Date: November 4, 1973 (31)
Last Spring Freeze of the Season
Average Date: May 1st
Earliest Date: March 31, 1946 (32)
Latest Date: May 27, 1992 (30)
First Killing Frost (28 Degrees or Lower)
Average Date: October 19th
Earliest Date: September 24, 1976 (28)
Latest Date: November 10, 1994 (28)
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