National Weather Service United States Department of Commerce


Normals and Records


First Freeze

First Freeze Normals
  Normal First Autumn 32° or Lower First Freeze Date Last Year (2021)
Chicago (O'Hare) October 19 November 2
Rockford October 13 October 23


Normals are based on 1991-2020 data.


First Freeze Records
  Earliest First Autumn 32° or Lower Latest First Autumn 32° or Lower
Chicago September 22, 1995  (32°) November 24, 1931  (30°)
Rockford September 13, 1975  (32°) November 11, 2016  (32°)


History of the Chicago and Rockford Weather Observation Sites.


Illinois Normal and Record First Freezes   |    Indiana Normal and Record First Freezes


This Autumn's Temperatures


Text Listing of Local Area Observed Low Temperatures

Maps of Midwest Recently Observed Low Temperatures


First Freeze Dates of this Autumn

Other Information