S
M
T
W
T
F
S
30
95°
74°
31
94°
73°
1
94°
73°
2
93°
72°
3
95°
74°
4
95°
74°
5
94°
73°
6
94°
72°
7
92°
67°
8
88°
68°
9
89°
71°
10
92°
67°
11
92°
67°
12
91°
69°
13
90°
70°
14
92°
71°
15
93°
70°
16
90°
66°
17
88°
65°
18
85°
64°
19
84°
69°
20
85°
63°
21
84°
63°
22
83°
64°
23
82°
67°
24
83°
67°
25
86°
68°
26
89°
68°
27
87°
67°
28
88°
67°
29
88°
66°
30
82°
64°
1
83°
65°
2
86°
59°
3
81°
58°
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 81° to 95°, with overnight lows between 58° and 74°. The average high for September is 89° with an average low of 68°. 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.
