S
M
T
W
T
F
S
30
87°
66°
31
88°
66°
1
90°
65°
2
90°
65°
3
91°
70°
4
91°
70°
5
90°
69°
6
91°
70°
7
89°
69°
8
88°
68°
9
86°
69°
10
88°
68°
11
89°
67°
12
89°
68°
13
88°
68°
14
88°
67°
15
87°
67°
16
89°
66°
17
88°
61°
18
82°
63°
19
87°
60°
20
83°
58°
21
80°
57°
22
79°
60°
23
80°
62°
24
85°
60°
25
85°
62°
26
86°
61°
27
85°
62°
28
85°
60°
29
84°
59°
30
84°
59°
1
83°
57°
2
83°
59°
3
77°
53°
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 77° to 91°, with overnight lows between 53° and 70°. The average high for September is 86° with an average low of 64°. 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.
