S
M
T
W
T
F
S
26
68°
26°
27
74°
28°
28
66°
29°
29
63°
30°
30
49°
42°
1
55°
29°
2
49°
27°
3
49°
27°
4
63°
24°
5
79°
31°
6
59°
43°
7
57°
28°
8
50°
26°
9
59°
23°
10
66°
33°
11
55°
27°
12
52°
24°
13
48°
27°
14
56°
41°
15
62°
49°
16
73°
54°
17
69°
36°
18
74°
46°
19
81°
61°
20
74°
35°
21
53°
31°
22
60°
37°
23
62°
41°
24
63°
42°
25
64°
47°
26
62°
44°
27
64°
49°
28
67°
45°
29
61°
43°
30
61°
48°
31
63°
47°
1
66°
47°
2
63°
46°
3
63°
47°
4
61°
48°
5
63°
49°
6
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Arm
South Arm's May 2026 forecast shows daily high temperatures ranging from 53° to 81°, with overnight lows between 31° and 61°. The average high for May is 65° with an average low of 45°. 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 South Arm. See also: June | July | August.