S
M
T
W
T
F
S
26
63°
54°
27
57°
36°
28
61°
36°
29
64°
35°
30
55°
33°
1
53°
34°
2
61°
37°
3
63°
42°
4
60°
41°
5
62°
41°
6
66°
42°
7
58°
37°
8
59°
38°
9
59°
39°
10
60°
49°
11
67°
46°
12
62°
42°
13
61°
40°
14
61°
40°
15
62°
42°
16
64°
47°
17
68°
51°
18
65°
45°
19
64°
43°
20
65°
44°
21
67°
53°
22
73°
50°
23
67°
47°
24
66°
45°
25
67°
47°
26
67°
49°
27
68°
50°
28
69°
54°
29
69°
55°
30
70°
51°
31
73°
53°
1
76°
58°
2
79°
60°
3
81°
59°
4
76°
56°
5
82°
60°
6
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rock Rapids
Rock Rapids's May 2026 forecast shows daily high temperatures ranging from 53° to 82°, with overnight lows between 33° and 60°. The average high for May is 66° with an average low of 46°. 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 Rapids. See also: June | July | August.