S
M
T
W
T
F
S
26
55°
39°
27
70°
36°
28
59°
41°
29
61°
50°
30
68°
39°
1
68°
34°
2
61°
43°
3
63°
37°
4
75°
39°
5
82°
46°
6
70°
57°
7
63°
43°
8
72°
37°
9
70°
52°
10
81°
46°
11
61°
43°
12
70°
36°
13
75°
54°
14
61°
52°
15
70°
48°
16
82°
43°
17
84°
55°
18
95°
62°
19
97°
61°
20
93°
64°
21
68°
55°
22
59°
50°
23
54°
50°
24
64°
59°
25
76°
59°
26
78°
63°
27
77°
63°
28
81°
54°
29
79°
57°
30
77°
54°
31
72°
56°
1
76°
57°
2
77°
57°
3
78°
61°
4
80°
62°
5
81°
64°
6
85°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rosemont
Rosemont's May 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 54° and 64°. The average high for May is 77° with an average low of 59°. 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 Rosemont. See also: June | July | August.
