S
M
T
W
T
F
S
26
64°
41°
27
57°
47°
28
60°
42°
29
50°
38°
30
47°
33°
1
46°
30°
2
59°
26°
3
69°
45°
4
69°
34°
5
51°
33°
6
47°
33°
7
52°
32°
8
60°
36°
9
59°
39°
10
59°
37°
11
60°
43°
12
61°
46°
13
62°
43°
14
62°
45°
15
66°
46°
16
68°
47°
17
67°
52°
18
68°
50°
19
70°
50°
20
67°
49°
21
66°
41°
22
61°
41°
23
63°
43°
24
62°
43°
25
63°
44°
26
63°
44°
27
64°
45°
28
63°
44°
29
66°
53°
30
65°
52°
31
66°
50°
1
71°
53°
2
74°
55°
3
76°
56°
4
77°
57°
5
77°
58°
6
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rib Mountain
Rib Mountain's May 2026 forecast shows daily high temperatures ranging from 47° to 77°, with overnight lows between 32° and 58°. The average high for May is 65° 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 Rib Mountain. See also: June | July | August.