S
M
T
W
T
F
S
30
99°
66°
31
99°
70°
1
99°
71°
2
97°
72°
3
95°
73°
4
97°
73°
5
97°
70°
6
98°
72°
7
99°
74°
8
99°
73°
9
98°
74°
10
95°
72°
11
90°
68°
12
88°
63°
13
90°
63°
14
92°
68°
15
89°
68°
16
91°
67°
17
91°
68°
18
90°
68°
19
91°
67°
20
90°
67°
21
89°
66°
22
89°
66°
23
88°
65°
24
89°
65°
25
89°
64°
26
88°
65°
27
89°
64°
28
89°
64°
29
88°
63°
30
89°
64°
1
88°
64°
2
87°
63°
3
87°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in West Otis
West Otis's September 2026 forecast shows daily high temperatures ranging from 87° to 99°, with overnight lows between 63° and 74°. The average high for September is 92° with an average low of 67°. 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 Otis. See also: October | November | December.