S
M
T
W
T
F
S
30
88°
66°
31
91°
64°
1
90°
61°
2
86°
64°
3
88°
70°
4
91°
70°
5
82°
66°
6
79°
68°
7
82°
64°
8
82°
64°
9
84°
55°
10
79°
52°
11
84°
63°
12
75°
50°
13
72°
45°
14
61°
43°
15
72°
48°
16
73°
45°
17
72°
57°
18
61°
57°
19
63°
57°
20
64°
55°
21
61°
52°
22
64°
46°
23
68°
45°
24
68°
52°
25
72°
57°
26
63°
57°
27
64°
55°
28
72°
54°
29
72°
59°
30
73°
61°
1
63°
43°
2
64°
37°
3
63°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Spring Valley
Spring Valley's September 2026 forecast shows daily high temperatures ranging from 63° to 63°, with overnight lows between 46° and 46°. The average high for September is 63° with an average low of 46°. 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 Spring Valley. See also: October | November | December.
