September Normals for Temperature and Precipitation for Chicago

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Max/Min Temperature and Precipitation Table (RTP) Text Products Being Discontinued on January 31, 2025

CHICAGO NORMALS (1991-2020)
JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC

September Normals for Chicago for Temperature and Precipitation

Day of Month	High	Low	Average	HDD	CDD	Precipitation
1	80.2	62.3	71.3	0.4	6.7	0.12
2	80	62.1	71	0.5	6.5	0.12
3	79.7	61.8	70.7	0.5	6.3	0.11
4	79.5	61.5	70.5	0.6	6.1	0.12
5	79.2	61.1	70.2	0.7	5.8	0.12
6	78.9	60.8	69.9	0.8	5.6	0.11
7	78.6	60.5	69.5	0.9	5.5	0.11
8	78.3	60.1	69.2	1	5.3	0.11
9	78	59.8	68.9	1.2	5	0.1
10	77.7	59.4	68.6	1.3	4.8	0.1
11	77.4	59	68.2	1.4	4.6	0.11
12	77	58.6	67.8	1.6	4.4	0.1
13	76.7	58.3	67.5	1.7	4.2	0.1
14	76.3	57.9	67.1	1.9	4	0.1
15	76	57.5	66.7	2.1	3.9	0.1
16	75.6	57.1	66.3	2.4	3.7	0.1
17	75.2	56.6	65.9	2.6	3.5	0.11
18	74.8	56.2	65.5	2.8	3.4	0.1
19	74.4	55.8	65.1	3	3.2	0.11
20	74	55.4	64.7	3.2	3	0.11
21	73.6	55	64.3	3.4	2.8	0.11
22	73.2	54.6	63.9	3.7	2.6	0.11
23	72.8	54.2	63.5	3.9	2.4	0.1
24	72.4	53.7	63.1	4.1	2.2	0.11
25	72	53.3	62.6	4.4	2.1	0.11
26	71.5	52.9	62.2	4.7	2	0.1
27	71.1	52.5	61.8	5.1	1.9	0.1
28	70.7	52.1	61.4	5.4	1.7	0.1
29	70.2	51.7	61	5.7	1.6	0.09
30	69.8	51.3	60.5	6	1.5	0.1

MONTH	75.5	57.1	66.3	77	116.3	3.19

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