S
M
T
W
T
F
S
26
77°
47°
27
71°
48°
28
78°
44°
29
79°
46°
30
75°
54°
1
57°
44°
2
66°
46°
3
72°
47°
4
77°
55°
5
64°
52°
6
68°
46°
7
74°
41°
8
84°
46°
9
88°
54°
10
82°
57°
11
83°
53°
12
91°
60°
13
90°
63°
14
88°
61°
15
87°
59°
16
86°
59°
17
84°
57°
18
83°
59°
19
84°
52°
20
82°
56°
21
81°
51°
22
83°
52°
23
83°
59°
24
90°
61°
25
78°
50°
26
79°
53°
27
86°
52°
28
89°
54°
29
89°
54°
30
85°
55°
31
87°
56°
1
88°
55°
2
86°
56°
3
83°
55°
4
84°
55°
5
86°
56°
6
89°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Valley
South Valley's May 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 50° and 61°. The average high for May is 86° with an average low of 55°. 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 Valley. See also: June | July | August.
