S
M
T
W
T
F
S
26
59°
42°
27
68°
47°
28
64°
50°
29
57°
40°
30
56°
37°
1
50°
35°
2
57°
32°
3
68°
45°
4
78°
50°
5
59°
43°
6
55°
42°
7
55°
46°
8
64°
46°
9
68°
51°
10
64°
47°
11
62°
49°
12
63°
51°
13
68°
53°
14
65°
51°
15
68°
55°
16
70°
54°
17
72°
50°
18
66°
52°
19
71°
56°
20
71°
56°
21
69°
46°
22
65°
46°
23
65°
48°
24
67°
48°
25
67°
49°
26
68°
49°
27
67°
50°
28
68°
49°
29
68°
54°
30
70°
59°
31
74°
55°
1
70°
55°
2
74°
60°
3
76°
60°
4
79°
60°
5
79°
62°
6
80°
63°
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 55° to 80°, with overnight lows between 42° and 63°. The average high for May is 68° with an average low of 52°. 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.
