Patrick Skach's Blog

This morning's low temperature of 49º recorded at O'Hare Airport is the coolest temperature Chicago has Officially experienced since May 7th of 2008, 125 days ago. 

49º is also 7º below the normal daily low temperature of 56º for September 9th.  The coolest Temperature for any September 9th is 43º recorded in 1986.
 
The most recent occurrences of overnight low temperatures in the 40ºs here in Chicago has been:
 
40º        May 24
41º        May 21
42º        May 29
43º        May 28
44º        May 25
45º        May 22
46º        May 23
47º        May 26
48º        May   1
49º        May   7
 
The number of times a September 9th has now experienced overnight low temperatures in the 40ºs has been:
 
49º        3
48º        3
47º        4
46º        0
45º        1
44º        0
43º        1