OCTOBER 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	68	48	58	8	1	0.10	0.0
2	68	47	58	8	1	0.09	0.0
3	68	47	57	9	1	0.11	0.0
4	67	46	57	9	1	0.10	0.0
5	67	46	56	9	1	0.10	0.0
6	66	46	56	10	1	0.10	0.0
7	66	45	56	10	1	0.10	0.0
8	66	45	55	10	1	0.09	0.0
9	65	45	55	11	1	0.11	0.1
10	65	44	54	11	1	0.10	0.0
11	64	44	54	11	0	0.10	0.0
12	64	44	54	12	0	0.10	0.0
13	64	44	54	12	0	0.10	0.0
14	63	43	53	12	0	0.10	0.0
15	63	43	53	12	0	0.10	0.0
16	62	43	52	13	0	0.09	0.0
17	62	42	52	13	0	0.10	0.0
18	62	42	52	13	0	0.11	0.0
19	61	42	52	14	0	0.10	0.1
20	61	42	51	14	0	0.10	0.0
21	60	41	51	14	0	0.10	0.0
22	60	41	50	15	0	0.11	0.0
23	60	41	50	15	0	0.10	0.0
24	59	41	50	15	0	0.10	0.0
25	59	40	50	16	0	0.10	0.0
26	58	40	49	16	0	0.11	0.0
27	58	40	49	16	0	0.11	0.0
28	58	39	48	17	0	0.11	0.1
29	57	39	48	17	0	0.10	0.0
30	57	39	48	17	0	0.11	0.0
31	56	39	47	18	0	0.10	0.0
MONTH	62.3	42.8	52.5	397	11	3.15	0.3

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.

CHICAGO O'HARE CURRENT AND HISTORY (3-DAY) ... | NWS Chicago Office OBSERVED WEATHER REPORTS

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SUNLIGHT DATA FOR SECURITY, TRAFFIC SAFETY, AND SPORTS
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