S
M
T
W
T
F
S
30
85°
67°
31
86°
67°
1
85°
66°
2
86°
66°
3
82°
65°
4
81°
66°
5
81°
65°
6
82°
64°
7
83°
64°
8
85°
66°
9
86°
67°
10
86°
67°
11
85°
66°
12
85°
65°
13
84°
66°
14
79°
65°
15
81°
62°
16
81°
65°
17
85°
64°
18
81°
62°
19
82°
63°
20
84°
61°
21
83°
62°
22
85°
63°
23
84°
62°
24
85°
61°
25
84°
61°
26
83°
57°
27
79°
54°
28
76°
56°
29
76°
59°
30
78°
64°
1
82°
65°
2
83°
60°
3
84°
55°
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 76° to 86°, with overnight lows between 54° and 67°. The average high for September is 83° 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 Spring Valley. See also: October | November | December.
