MAY 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	65	44	54	11	0	0.11	0.0
2	66	44	55	11	0	0.12	0.0
3	66	45	55	10	1	0.12	0.0
4	66	45	56	10	1	0.11	0.0
5	67	45	56	10	1	0.12	0.0
6	67	45	56	10	1	0.11	0.0
7	67	46	56	9	1	0.12	0.0
8	68	46	57	9	1	0.11	0.0
9	68	46	57	9	1	0.12	0.0
10	68	47	57	9	1	0.12	0.0
11	69	47	58	8	1	0.11	0.0
12	69	47	58	8	1	0.12	0.0
13	69	47	58	8	1	0.12	0.0
14	69	48	59	8	1	0.12	0.0
15	70	48	59	7	1	0.12	0.0
16	70	48	59	7	1	0.12	0.0
17	70	49	59	7	1	0.12	0.0
18	71	49	60	7	1	0.13	0.0
19	71	49	60	6	2	0.12	0.0
20	71	49	60	6	2	0.12	0.0
21	72	50	61	6	2	0.13	0.0
22	72	50	61	6	2	0.12	0.0
23	72	50	61	6	2	0.13	0.0
24	73	51	62	5	2	0.11	0.0
25	73	51	62	5	2	0.12	0.0
26	73	51	62	5	2	0.11	0.0
27	74	52	62	5	2	0.12	0.0
28	74	52	63	5	2	0.12	0.0
29	74	52	63	4	2	0.12	0.0
30	74	53	64	4	3	0.12	0.0
31	75	53	64	4	3	0.12	0.0
MONTH	70.0	48.3	59.1	225	44	3.68	T

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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