National Weather Service United States Department of Commerce

Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. 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