S
M
T
W
T
F
S
30
86°
71°
31
86°
70°
1
87°
71°
2
86°
69°
3
88°
71°
4
90°
72°
5
90°
71°
6
86°
71°
7
89°
68°
8
88°
68°
9
85°
67°
10
85°
67°
11
86°
66°
12
86°
66°
13
87°
67°
14
88°
68°
15
87°
70°
16
88°
69°
17
88°
64°
18
86°
63°
19
82°
64°
20
82°
69°
21
85°
67°
22
87°
64°
23
84°
68°
24
86°
68°
25
86°
67°
26
83°
67°
27
86°
66°
28
85°
66°
29
82°
65°
30
81°
65°
1
83°
66°
2
84°
60°
3
83°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Germantown
Germantown's September 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 59° and 72°. The average high for September is 86° 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 Germantown. See also: October | November | December.
