S
M
T
W
T
F
S
30
97°
75°
31
82°
69°
1
94°
66°
2
92°
72°
3
91°
74°
4
92°
72°
5
97°
70°
6
98°
72°
7
98°
75°
8
96°
75°
9
98°
74°
10
100°
71°
11
96°
74°
12
91°
70°
13
95°
68°
14
90°
72°
15
91°
70°
16
88°
69°
17
90°
69°
18
94°
70°
19
96°
69°
20
94°
68°
21
93°
69°
22
92°
67°
23
89°
66°
24
92°
67°
25
96°
68°
26
93°
67°
27
92°
66°
28
87°
60°
29
86°
61°
30
86°
60°
1
90°
62°
2
90°
64°
3
87°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Green Valley
Green Valley's September 2026 forecast shows daily high temperatures ranging from 86° to 96°, with overnight lows between 57° and 72°. The average high for September is 91° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Green Valley. See also: October | November | December.
