S
M
T
W
T
F
S
30
89°
65°
31
88°
65°
1
87°
66°
2
88°
67°
3
88°
64°
4
84°
63°
5
84°
63°
6
87°
67°
7
88°
66°
8
87°
66°
9
87°
66°
10
86°
65°
11
87°
66°
12
87°
67°
13
86°
65°
14
86°
65°
15
85°
62°
16
86°
63°
17
85°
63°
18
85°
60°
19
84°
63°
20
83°
62°
21
84°
63°
22
83°
62°
23
84°
61°
24
82°
62°
25
82°
58°
26
82°
61°
27
82°
60°
28
82°
60°
29
83°
61°
30
Hist. Avg.
79°
56°
1
Hist. Avg.
79°
55°
2
Hist. Avg.
79°
55°
3
Hist. Avg.
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Valley
Valley's September 2026 forecast shows daily high temperatures ranging from 82° to 89°, with overnight lows between 58° and 67°. The average high for September is 85° with an average low of 63°. 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 Valley. See also: October | November | December.
