S
M
T
W
T
F
S
30
68°
46°
31
71°
49°
1
70°
49°
2
72°
50°
3
73°
52°
4
74°
53°
5
73°
52°
6
74°
51°
7
73°
52°
8
74°
53°
9
72°
51°
10
72°
44°
11
Hist. Avg.
70°
50°
12
Hist. Avg.
70°
50°
13
Hist. Avg.
69°
49°
14
Hist. Avg.
69°
49°
15
Hist. Avg.
69°
49°
16
Hist. Avg.
68°
48°
17
Hist. Avg.
68°
48°
18
Hist. Avg.
68°
48°
19
Hist. Avg.
67°
48°
20
Hist. Avg.
67°
47°
21
Hist. Avg.
67°
47°
22
Hist. Avg.
66°
47°
23
Hist. Avg.
66°
46°
24
Hist. Avg.
66°
46°
25
Hist. Avg.
65°
46°
26
Hist. Avg.
65°
45°
27
Hist. Avg.
65°
45°
28
Hist. Avg.
64°
45°
29
Hist. Avg.
64°
44°
30
Hist. Avg.
64°
44°
1
Hist. Avg.
63°
44°
2
Hist. Avg.
63°
43°
3
Hist. Avg.
62°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Maple Valley
Maple Valley's September 2026 forecast shows daily high temperatures ranging from 68° to 74°, with overnight lows between 44° and 53°. The average high for September is 72° with an average low of 50°. 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. See also: October | November | December.
