S
M
T
W
T
F
S
30
68°
63°
31
72°
59°
1
68°
57°
2
72°
54°
3
72°
61°
4
68°
56°
5
64°
53°
6
68°
55°
7
77°
60°
8
66°
52°
9
64°
50°
10
64°
53°
11
64°
54°
12
64°
51°
13
63°
51°
14
65°
51°
15
62°
52°
16
64°
51°
17
63°
52°
18
64°
52°
19
67°
51°
20
67°
52°
21
66°
51°
22
66°
52°
23
65°
52°
24
66°
51°
25
66°
51°
26
65°
50°
27
65°
51°
28
64°
51°
29
64°
50°
30
63°
47°
1
58°
45°
2
57°
43°
3
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Apensen
Apensen's September 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 43° and 60°. The average high for September is 65° with an average low of 51°. 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 Apensen. See also: October | November | December.