S
M
T
W
T
F
S
26
55°
39°
27
52°
39°
28
54°
38°
29
51°
37°
30
52°
35°
1
53°
32°
2
50°
32°
3
52°
35°
4
52°
35°
5
53°
36°
6
54°
38°
7
54°
38°
8
55°
40°
9
56°
38°
10
55°
40°
11
56°
37°
12
57°
40°
13
58°
40°
14
57°
39°
15
57°
44°
16
58°
47°
17
59°
43°
18
58°
40°
19
63°
50°
20
70°
52°
21
71°
47°
22
61°
43°
23
62°
44°
24
63°
45°
25
70°
51°
26
73°
52°
27
73°
50°
28
70°
44°
29
71°
50°
30
74°
49°
31
65°
53°
1
71°
51°
2
66°
46°
3
67°
44°
4
64°
50°
5
66°
53°
6
68°
54°
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 50° to 74°, with overnight lows between 32° and 54°. The average high for May is 61° with an average low of 43°. 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.
