Our First Snowfall; How it Compares to Climatology

Here are the climate statistics for the First Snowfall of the Season for Chicago and Rockford.


    The first snowfall occurred across much of the area during the middle of this week.  Many places just recorded a trace, including Chicago (O'Hare) and Rockford.

 Rockford

Trace or More

Average Date: November 2nd
Earliest: October 3, 1951 (Trace)
Latest: December 19, 1999 (0.1 inches)

Measurable (0.1 inches or more)
Average Date: November 20th
Earliest: October 12, 1909 (0.2 inches)
Latest: January 7, 1940 (1.6 inches)

One Inch or More

Average Date: December 1st
Earliest: October 23, 1917 (1.0 inches)
  October 23, 1929 (5.0 inches)
Latest: February 7, 1921 (2.2 inch)

 

Chicago

Trace or More

Average Date: October 30th
Earliest: September 25, 1942 (Trace)
  September 25, 1948 (Trace)
Latest: December 5, 1999 (0.1 inches)

Measurable (0.1 inches or more)
Average Date: November 16th
Earliest: October 12, 2006 (0.3 inches)
Latest: December 16, 1965 (0.3 inches)

One Inch or More

Average Date: December 2nd
Earliest: October 19th, 1989 (3.8 inches)
Latest: January 17, 1899 (1.0 inch)



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