S
M
T
W
T
F
S
26
79°
66°
27
83°
61°
28
87°
62°
29
91°
65°
30
93°
66°
1
90°
68°
2
94°
71°
3
98°
77°
4
80°
72°
5
80°
66°
6
86°
62°
7
97°
67°
8
101°
71°
9
105°
74°
10
106°
75°
11
109°
77°
12
108°
80°
13
101°
81°
14
101°
75°
15
98°
73°
16
100°
74°
17
96°
73°
18
87°
68°
19
91°
68°
20
94°
70°
21
96°
69°
22
98°
72°
23
99°
74°
24
100°
76°
25
97°
74°
26
98°
72°
27
96°
67°
28
93°
66°
29
92°
69°
30
97°
74°
31
101°
78°
1
105°
79°
2
107°
81°
3
104°
81°
4
103°
79°
5
101°
78°
6
103°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Phoenix
South Phoenix's May 2026 forecast shows daily high temperatures ranging from 92° to 107°, with overnight lows between 66° and 81°. The average high for May is 100° with an average low of 75°. 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 Phoenix. See also: June | July | August.
