S
M
T
W
T
F
S
26
60°
44°
27
68°
51°
28
64°
50°
29
57°
39°
30
56°
38°
1
50°
36°
2
56°
32°
3
67°
45°
4
81°
49°
5
60°
46°
6
58°
42°
7
61°
36°
8
65°
43°
9
76°
49°
10
62°
45°
11
56°
44°
12
74°
44°
13
59°
44°
14
65°
42°
15
76°
55°
16
83°
63°
17
87°
67°
18
80°
66°
19
79°
61°
20
61°
50°
21
61°
50°
22
67°
53°
23
70°
55°
24
74°
59°
25
84°
58°
26
83°
62°
27
82°
61°
28
72°
56°
29
84°
53°
30
74°
58°
31
74°
57°
1
71°
56°
2
75°
54°
3
76°
65°
4
85°
69°
5
80°
67°
6
80°
61°
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 76° to 85°, with overnight lows between 61° and 69°. The average high for May is 80° with an average low of 66°. 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.
