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°
52°
20
54°
47°
21
57°
51°
22
58°
55°
23
62°
56°
24
68°
58°
25
72°
61°
26
71°
62°
27
70°
63°
28
74°
64°
29
71°
63°
30
75°
65°
31
77°
65°
1
72°
55°
2
74°
59°
3
67°
55°
4
66°
54°
5
69°
60°
6
74°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Millennium Park
Millennium Park's May 2026 forecast shows daily high temperatures ranging from 54° to 79°, with overnight lows between 47° and 65°. The average high for May is 69° with an average low of 58°. 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 Millennium Park. See also: June | July | August.
