S
M
T
W
T
F
S
26
60°
44°
27
74°
44°
28
71°
54°
29
58°
45°
30
54°
39°
1
49°
37°
2
45°
32°
3
59°
32°
4
72°
46°
5
68°
50°
6
58°
41°
7
57°
38°
8
64°
41°
9
69°
50°
10
65°
46°
11
67°
36°
12
69°
40°
13
65°
45°
14
62°
42°
15
68°
37°
16
75°
48°
17
83°
59°
18
87°
64°
19
86°
61°
20
67°
43°
21
69°
51°
22
62°
58°
23
73°
60°
24
72°
55°
25
73°
56°
26
76°
58°
27
75°
57°
28
78°
59°
29
76°
55°
30
79°
59°
31
80°
60°
1
75°
52°
2
76°
57°
3
76°
55°
4
70°
54°
5
70°
53°
6
73°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Green Valley
Green Valley's May 2026 forecast shows daily high temperatures ranging from 62° to 86°, with overnight lows between 43° and 61°. The average high for May is 74° with an average low of 56°. 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 Green Valley. See also: June | July | August.