S
M
T
W
T
F
S
26
76°
42°
27
74°
55°
28
64°
49°
29
61°
39°
30
58°
34°
1
55°
37°
2
60°
45°
3
70°
45°
4
78°
47°
5
58°
42°
6
53°
38°
7
57°
39°
8
65°
45°
9
68°
46°
10
69°
49°
11
68°
50°
12
69°
49°
13
69°
47°
14
71°
51°
15
65°
51°
16
66°
48°
17
66°
56°
18
71°
56°
19
71°
57°
20
74°
58°
21
75°
58°
22
71°
55°
23
69°
49°
24
66°
50°
25
67°
53°
26
70°
58°
27
71°
54°
28
70°
52°
29
69°
51°
30
75°
56°
31
71°
52°
1
72°
61°
2
81°
57°
3
72°
54°
4
73°
53°
5
73°
53°
6
74°
54°
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 53° to 81°, with overnight lows between 37° and 61°. The average high for May is 69° with an average low of 51°. 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.
