Extreme Heat and Excessive Rainfall This Week

A significant heat wave is underway for the Intermountain West, Northern Plains, and Upper Great Lakes, peaking in intensity through midweek and lingering across parts of the Northern Plains and Midwest until this weekend. In southwest Texas, excessive rainfall may bring a risk for potentially life-threatening flash and arroyo flooding through Thursday. Read More >

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

April Normals for Chicago for Temperature, Precipitation and Snowfall

Day of Month	High	Low	Average	HDD	CDD	Precipitation	Snowfall
1	53.3	35.6	44.4	20.7	0.1	0.1	0.1
2	53.7	35.9	44.8	20.3	0.1	0.1	0.1
3	54	36.2	45.1	20	0.1	0.11	0.1
4	54.4	36.5	45.5	19.6	0.1	0.11	0.1
5	54.8	36.8	45.8	19.3	0.1	0.11	0
6	55.2	37.1	46.2	18.9	0.1	0.11	0.1
7	55.6	37.4	46.5	18.6	0.1	0.11	0
8	56	37.7	46.9	18.3	0.1	0.12	0.1
9	56.4	38	47.2	17.9	0.2	0.11	0
10	56.8	38.4	47.6	17.6	0.2	0.12	0.1
11	57.2	38.7	47.9	17.3	0.2	0.11	0
12	57.6	39	48.3	16.9	0.2	0.12	0.1
13	58	39.4	48.7	16.5	0.2	0.12	0
14	58.4	39.7	49.1	16.2	0.2	0.11	0.1
15	58.8	40	49.4	15.8	0.2	0.12	0
16	59.2	40.4	49.8	15.4	0.2	0.13	0
17	59.6	40.7	50.2	15.1	0.3	0.13	0.1
18	60	41.1	50.5	14.7	0.3	0.14	0
19	60.4	41.4	50.9	14.4	0.3	0.13	0
20	60.8	41.8	51.3	14	0.3	0.14	0.1
21	61.2	42.1	51.7	13.6	0.3	0.13	0
22	61.6	42.5	52	13.3	0.3	0.13	0
23	62	42.8	52.4	12.9	0.3	0.14	0.1
24	62.4	43.2	52.8	12.6	0.3	0.13	0
25	62.8	43.5	53.2	12.2	0.4	0.14	0
26	63.2	43.9	53.5	11.9	0.4	0.14	0
27	63.6	44.2	53.9	11.5	0.4	0.14	0.1
28	64	44.6	54.3	11.2	0.5	0.15	0
29	64.3	44.9	54.6	10.8	0.5	0.15	0
30	64.7	45.3	55	10.5	0.5	0.15	0

MONTH	59	40.3	49.7	468	7.5	3.75	1.3

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Extreme Heat and Excessive Rainfall This Week

April Normals for Temperatures, Precipitation and Snowfall for Chicago