Dangerous Heat in the Central and Southern U.S.; Thunderstorms and Heavy Rain in the Northern Plains

Dangerous, prolonged heat is expected across portions of the Central and Southeast U.S. through July. Scattered severe thunderstorms are expected over parts of the northern Plains into the upper Mississippi Valley Tuesday, with damaging winds and large hail as the primary threats. Heavy rainfall could lead to areas of flooding across the northern Plains, Upper Midwest, Southeast and Southwest. Read More >

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

December Normals for Chicago for Temperature, Precipitation and Snowfall

Day of Month	High	Low	Average	HDD	CDD	Precipitation	Snowfall
1	41.3	28.4	34.8	30.2	0	0.08	0.2
2	40.9	28.1	34.5	30.5	0	0.08	0.2
3	40.5	27.7	34.1	30.9	0	0.07	0.2
4	40.1	27.4	33.8	31.2	0	0.08	0.2
5	39.8	27.1	33.4	31.5	0	0.08	0.3
6	39.4	26.8	33.1	31.9	0	0.07	0.2
7	39	26.6	32.8	32.2	0	0.08	0.2
8	38.7	26.3	32.5	32.5	0	0.07	0.2
9	38.4	26	32.2	32.8	0	0.08	0.2
10	38	25.7	31.9	33.1	0	0.07	0.3
11	37.7	25.5	31.6	33.4	0	0.07	0.2
12	37.4	25.2	31.3	33.7	0	0.06	0.2
13	37.1	25	31	33.9	0	0.07	0.3
14	36.8	24.7	30.8	34.2	0	0.07	0.2
15	36.6	24.5	30.5	34.5	0	0.06	0.2
16	36.3	24.2	30.3	34.7	0	0.06	0.3
17	36	24	30	35	0	0.07	0.2
18	35.8	23.8	29.8	35.2	0	0.06	0.3
19	35.5	23.6	29.5	35.5	0	0.07	0.2
20	35.3	23.3	29.3	35.7	0	0.06	0.2
21	35	23.1	29.1	35.9	0	0.06	0.3
22	34.8	22.9	28.8	36.1	0	0.07	0.3
23	34.6	22.7	28.6	36.4	0	0.06	0.2
24	34.4	22.5	28.4	36.6	0	0.07	0.3
25	34.2	22.2	28.2	36.8	0	0.06	0.3
26	34	22	28	37	0	0.06	0.2
27	33.8	21.8	27.8	37.2	0	0.06	0.3
28	33.6	21.6	27.6	37.4	0	0.07	0.3
29	33.4	21.4	27.4	37.6	0	0.06	0.3
30	33.2	21.2	27.2	37.8	0	0.06	0.3
31	33	21	27	38	0	0.07	0.3

MONTH	36.6	24.4	30.5	1069.4	0	2.11	7.6

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Dangerous Heat in the Central and Southern U.S.; Thunderstorms and Heavy Rain in the Northern Plains

December Normals for Temperature, Precipitation and Snowfall for Chicago, IL