S
M
T
W
T
F
S
26
76°
42°
27
74°
55°
28
64°
49°
29
61°
39°
30
58°
34°
1
56°
34°
2
60°
34°
3
73°
47°
4
83°
40°
5
56°
46°
6
57°
35°
7
65°
29°
8
69°
44°
9
76°
50°
10
69°
37°
11
68°
41°
12
83°
47°
13
70°
44°
14
74°
38°
15
82°
57°
16
83°
62°
17
85°
66°
18
76°
63°
19
73°
47°
20
67°
45°
21
68°
52°
22
63°
54°
23
73°
56°
24
76°
55°
25
80°
57°
26
80°
61°
27
82°
60°
28
80°
59°
29
81°
60°
30
81°
62°
31
82°
61°
1
78°
57°
2
80°
60°
3
73°
56°
4
73°
56°
5
77°
62°
6
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rock Island
Rock Island's May 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 45° and 63°. The average high for May is 76° with an average low of 57°. 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 Rock Island. See also: June | July | August.
