S
M
T
W
T
F
S
30
81°
46°
31
81°
48°
1
80°
53°
2
79°
53°
3
78°
52°
4
78°
50°
5
77°
47°
6
78°
43°
7
77°
42°
8
78°
43°
9
78°
41°
10
82°
42°
11
82°
48°
12
73°
41°
13
76°
47°
14
77°
51°
15
Hist. Avg.
80°
45°
16
Hist. Avg.
80°
45°
17
Hist. Avg.
79°
44°
18
Hist. Avg.
79°
44°
19
Hist. Avg.
78°
44°
20
Hist. Avg.
78°
44°
21
Hist. Avg.
78°
43°
22
Hist. Avg.
77°
43°
23
Hist. Avg.
77°
43°
24
Hist. Avg.
76°
42°
25
Hist. Avg.
76°
42°
26
Hist. Avg.
75°
42°
27
Hist. Avg.
75°
42°
28
Hist. Avg.
74°
41°
29
Hist. Avg.
74°
41°
30
Hist. Avg.
73°
41°
1
Hist. Avg.
73°
40°
2
Hist. Avg.
72°
40°
3
Hist. Avg.
72°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in West Valley
West Valley's September 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 41° and 53°. The average high for September is 78° with an average low of 47°. 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 West Valley. See also: October | November | December.
