Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Chicago Monthly and Yearly Normals (1981-2010)
	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
HIGH	31.0	35.3.	46.6	59.0	70.0	79.7	84.1	81.9	74.8	62.3	48.2	34.8	59.1
LOW	16.5	20.1	29.2	38.8	48.3	58.1	63.9	62.9	54.3	42.8	32.4	20.7	40.8
AVERAGE	23.8	27.7	37.9	48.9	59.1	68.9	74.0	72.4	64.6	52.5	40.3	27.7	49.9
HEATING DEGREE DAYS	1279	1044	841	492	225	48	4	9	105	397	741	1155	6339
COOLING DEGREE DAYS	0	0	0	9	44	165	283	238	92	11	0	0	842
PRECIPITATION	1.73	1.79	2.50	3.38	3.68	3.45	3.70	4.90	3.21	3.15	3.15	2.25	36.89
SNOWFALL	10.8	9.1	5.6	1.2	T	0.0	0.0	0.0	0.0	0.2	1.2	8.2	36.3

Rockford Monthly and Yearly Normals (1981-2010)
	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
HIGH	29.5	34.2	46.9	60.7	71.8	81.1	84.5	82.4	75.4	62.7	47.6	33.2	59.3
LOW	13.5	17.7	27.5	38.1	48.4	58.5	63.0	61.3	52.4	40.7	30.3	17.7	39.2
AVERAGE	21.5	25.9	37.2	49.4	60.1	69.8	73.8	71.9	63.9	51.7	38.9	25.4	49.2
HEATING DEGREE DAYS	1348	1093	862	476	198	31	3	11	117	422	782	1226	6569
COOLING DEGREE DAYS	0	0	0	8	47	175	274	223	84	9	0	0	820
PRECIPITATION	1.37	1.41	2.32	3.35	4.02	4.65	3.95	4.59	3.35	2.67	2.58	1.98	36.24
SNOWFALL	10.2	7.7	4.8	0.9	T	0.0	0.0	0.0	0.0	0.1	1.7	11.3	36.7

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Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

1981-2010 Monthly and Yearly Normals for Chicago and Rockford