S
M
T
W
T
F
S
26
53°
40°
27
67°
36°
28
54°
47°
29
54°
49°
30
61°
40°
1
63°
35°
2
54°
41°
3
59°
36°
4
73°
38°
5
80°
59°
6
68°
52°
7
64°
48°
8
65°
38°
9
65°
49°
10
70°
48°
11
62°
45°
12
68°
41°
13
67°
50°
14
54°
47°
15
68°
47°
16
79°
46°
17
83°
59°
18
90°
63°
19
91°
68°
20
86°
66°
21
66°
50°
22
59°
47°
23
49°
46°
24
58°
47°
25
75°
57°
26
73°
61°
27
78°
64°
28
71°
52°
29
75°
55°
30
69°
49°
31
69°
53°
1
71°
53°
2
71°
51°
3
72°
52°
4
77°
55°
5
80°
61°
6
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Mountain
South Mountain's May 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 49° and 61°. The average high for May is 74° with an average low of 54°. 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 Mountain. See also: June | July | August.
