S
M
T
W
T
F
S
26
56°
37°
27
67°
42°
28
64°
51°
29
55°
32°
30
49°
38°
1
44°
35°
2
52°
43°
3
60°
45°
4
73°
45°
5
55°
42°
6
50°
40°
7
47°
40°
8
53°
42°
9
57°
43°
10
55°
45°
11
57°
47°
12
60°
48°
13
63°
46°
14
61°
47°
15
57°
45°
16
57°
44°
17
58°
51°
18
63°
52°
19
60°
51°
20
63°
52°
21
65°
51°
22
60°
52°
23
66°
47°
24
59°
46°
25
59°
49°
26
61°
54°
27
65°
53°
28
62°
51°
29
62°
48°
30
65°
46°
31
62°
46°
1
62°
52°
2
72°
51°
3
62°
49°
4
64°
48°
5
64°
49°
6
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chicago
Chicago's May 2026 forecast shows daily high temperatures ranging from 44° to 73°, with overnight lows between 35° and 54°. The average high for May is 60° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Chicago. See also: June | July | August.
