Greatest spread between record high and low

Dear Tom,
In Chicago, which calendar date has the greatest deviation between the
record high temperature for the date and the record low temperature on that
same date? My guess is that it occurs sometime in March.
Bruce Brothers, Marengo, Ill.
Dear Bruce,
Actually, it happened in January -- Jan. 20, to be specific.
On that date in 1906, Chicago's temperature jumped to 63 degrees,
establishing a record high for the date, and on Jan. 20, 1985, the city
shivered at 27 degrees below zero, the record low for the date (and also the
city's all-time lowest temperature in official records dating from Nov. 1,
1870).
The range between those two temperatures (63 degrees and 27 below) is 90
degrees, and that stands as the greatest deviation between the record high
and record low temperatures on any single day of the year.