Severe Thunderstorms and Excessive Rainfall in the Mid-Atlantic; Heat and Fire Weather Concerns in the West

Scattered strong to severe storms, excessive rainfall, and flooding are expected across parts of the Mid-Atlantic into the Northeast today. Flood Watches are in effect. Heat will continue to impact the West today. Heat advisories are in effect for portions of the Intermountain West; and Extreme Heat Warnings are in effect for portions of Arizona and southeast California. Read More >

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

May Normals for Chicago for Temperature and Precipitation

Day of Month	High	Low	Average	HDD	CDD	Precipitation
1	65.1	45.6	55.4	10.2	0.6	0.15
2	65.5	46	55.7	9.9	0.6	0.14
3	65.9	46.3	56.1	9.6	0.7	0.15
4	66.2	46.7	56.4	9.3	0.7	0.15
5	66.6	47	56.8	9	0.8	0.14
6	67	47.3	57.2	8.7	0.9	0.14
7	67.3	47.7	57.5	8.5	1	0.15
8	67.7	48	57.8	8.2	1	0.15
9	68.1	48.3	58.2	7.9	1.1	0.15
10	68.4	48.6	58.5	7.7	1.2	0.15
11	68.8	49	58.9	7.4	1.3	0.15
12	69.1	49.3	59.2	7.1	1.4	0.15
13	69.5	49.6	59.6	6.9	1.5	0.16
14	69.9	49.9	59.9	6.7	1.6	0.15
15	70.2	50.3	60.2	6.4	1.7	0.14
16	70.6	50.6	60.6	6.2	1.8	0.15
17	70.9	50.9	60.9	6	1.9	0.15
18	71.2	51.2	61.2	5.8	2	0.14
19	71.6	51.6	61.6	5.6	2.2	0.15
20	71.9	51.9	61.9	5.4	2.3	0.15
21	72.3	52.2	62.3	5.2	2.4	0.15
22	72.6	52.5	62.6	5	2.6	0.15
23	73	52.9	62.9	4.8	2.7	0.14
24	73.3	53.2	63.3	4.6	2.8	0.14
25	73.7	53.5	63.6	4.4	3	0.14
26	74	53.9	63.9	4.1	3.1	0.13
27	74.3	54.2	64.3	3.9	3.2	0.14
28	74.7	54.6	64.6	3.7	3.3	0.14
29	75	54.9	65	3.5	3.5	0.13
30	75.4	55.2	65.3	3.3	3.6	0.13
31	75.7	55.6	65.6	3.1	3.8	0.14

MONTH	70.5	50.6	60.6	198.1	60.3	4.49

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Severe Thunderstorms and Excessive Rainfall in the Mid-Atlantic; Heat and Fire Weather Concerns in the West

May Normals for Temperature and Precipitation for Chicago