S
M
T
W
T
F
S
30
72°
52°
31
73°
50°
1
73°
50°
2
72°
51°
3
73°
50°
4
74°
49°
5
74°
50°
6
73°
52°
7
71°
50°
8
72°
48°
9
71°
50°
10
70°
47°
11
70°
46°
12
71°
47°
13
73°
53°
14
70°
47°
15
74°
52°
16
76°
54°
17
76°
55°
18
75°
51°
19
76°
44°
20
70°
44°
21
66°
51°
22
67°
50°
23
70°
52°
24
72°
51°
25
71°
42°
26
72°
39°
27
64°
42°
28
61°
41°
29
62°
41°
30
61°
39°
1
Hist. Avg.
64°
40°
2
Hist. Avg.
64°
40°
3
Hist. Avg.
63°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Maple Valley Township
Maple Valley Township's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 39° and 55°. The average high for September is 71° with an average low of 48°. 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 Maple Valley Township. See also: October | November | December.