Average Climatic Data, Chicago, Illinois
		J	F	M	A	M	J	J	A	S	O	N	D	AVERAGE
Chicago, IL	temperature (C)	-4	-2.5	2.6	8.9	14.9	20.3	23.4	22.8	18.9	12.6	5	-1.4	10.1
	rainfall (mm)	46.7	44.6	68.2	80	88	93	89.2	86.2	81.4	64.3	61.9	54.5	858.8