S
M
T
W
T
F
S
26
62°
42°
27
73°
39°
28
62°
40°
29
67°
48°
30
65°
48°
1
66°
40°
2
61°
40°
3
59°
40°
4
68°
52°
5
81°
57°
6
71°
51°
7
62°
41°
8
61°
39°
9
63°
44°
10
66°
49°
11
67°
49°
12
67°
48°
13
66°
48°
14
68°
49°
15
68°
51°
16
69°
50°
17
69°
50°
18
70°
54°
19
77°
55°
20
76°
55°
21
72°
54°
22
78°
52°
23
74°
53°
24
78°
53°
25
72°
48°
26
71°
51°
27
71°
55°
28
75°
57°
29
80°
56°
30
79°
55°
31
78°
54°
1
75°
49°
2
71°
49°
3
71°
50°
4
74°
49°
5
73°
50°
6
74°
50°
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 59° to 81°, with overnight lows between 39° and 57°. The average high for May is 71° with an average low of 50°. 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.
