APRIL CHICAGO NORMALS FOR TEMPERATURE, PRECIPITATION, SNOWFALL (1981-2010)

JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC

Day of Month	High	Low	Average	HDD	CDD	Precipitation	Snowfall
1	53	34	44	22	0	0.10	0.1
2	54	34	44	21	0	0.11	0.1
3	54	35	44	21	0	0.10	0.1
4	54	35	45	20	0	0.11	0.1
5	55	35	45	20	0	0.10	0.1
6	55	36	45	20	0	0.10	0.0
7	56	36	46	19	0	0.11	0.1
8	56	36	46	19	0	0.11	0.0
9	56	37	46	19	0	0.12	0.1
10	57	37	47	18	0	0.11	0.0
11	57	37	47	18	0	0.12	0.1
12	58	38	48	18	0	0.11	0.0
13	58	38	48	17	0	0.11	0.1
14	58	38	48	17	0	0.11	0.0
15	59	39	49	17	0	0.12	0.1
16	59	39	49	16	0	0.11	0.0
17	60	39	50	16	0	0.12	0.0
18	60	40	50	16	0	0.11	0.1
19	61	40	50	15	0	0.12	0.0
20	61	40	51	15	0	0.11	0.0
21	61	41	51	15	0	0.11	0.0
22	62	41	51	14	0	0.12	0.0
23	62	41	52	14	0	0.11	0.1
24	63	42	52	13	0	0.11	0.0
25	63	42	52	13	0	0.12	0.0
26	63	42	53	13	0	0.12	0.0
27	64	43	53	12	0	0.12	0.0
28	64	43	54	12	0	0.12	0.0
29	64	43	54	12	0	0.12	0.0
30	65	44	54	11	0	0.12	0.0
MONTH	59	38.8	48.9	492	9	3.38	1.2

HDD = A Heating Degree Day represents the number of degree(s) that the mean temperature for the day is below 65 degrees during a day.

CDD = A Cooling Degree Day represents the number of degree(s) that the mean temperature for the day is above 65 degrees during a day.

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