S
M
T
W
T
F
S
26
62°
45°
27
63°
43°
28
71°
47°
29
65°
49°
30
66°
45°
1
68°
43°
2
66°
45°
3
67°
48°
4
73°
48°
5
71°
53°
6
75°
55°
7
76°
54°
8
72°
54°
9
67°
51°
10
68°
47°
11
67°
46°
12
67°
45°
13
69°
47°
14
68°
53°
15
70°
47°
16
71°
55°
17
76°
53°
18
70°
48°
19
69°
48°
20
70°
50°
21
72°
58°
22
78°
59°
23
79°
58°
24
73°
58°
25
78°
60°
26
81°
60°
27
80°
55°
28
73°
52°
29
84°
58°
30
83°
59°
31
83°
56°
1
82°
53°
2
83°
54°
3
81°
55°
4
77°
57°
5
79°
57°
6
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Roselle
Roselle's May 2026 forecast shows daily high temperatures ranging from 62° to 84°, with overnight lows between 43° and 60°. The average high for May is 73° 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 Roselle. See also: June | July | August.