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°
46°
8
64°
53°
9
69°
49°
10
57°
45°
11
56°
45°
12
57°
47°
13
56°
48°
14
62°
53°
15
65°
54°
16
66°
55°
17
71°
60°
18
70°
59°
19
69°
58°
20
67°
51°
21
60°
48°
22
60°
47°
23
61°
50°
24
62°
50°
25
63°
50°
26
63°
49°
27
64°
49°
28
66°
50°
29
68°
56°
30
73°
57°
31
74°
59°
1
74°
56°
2
68°
57°
3
75°
60°
4
76°
61°
5
76°
60°
6
68°
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 56° to 76°, with overnight lows between 45° and 61°. The average high for May is 66° with an average low of 53°. 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.
