S
M
T
W
T
F
S
30
67°
56°
31
71°
56°
1
73°
55°
2
73°
50°
3
72°
47°
4
67°
48°
5
67°
49°
6
70°
48°
7
68°
50°
8
65°
47°
9
65°
49°
10
64°
51°
11
65°
53°
12
64°
52°
13
Hist. Avg.
64°
49°
14
Hist. Avg.
64°
49°
15
Hist. Avg.
64°
49°
16
Hist. Avg.
63°
49°
17
Hist. Avg.
63°
49°
18
Hist. Avg.
63°
48°
19
Hist. Avg.
63°
48°
20
Hist. Avg.
62°
48°
21
Hist. Avg.
62°
48°
22
Hist. Avg.
62°
48°
23
Hist. Avg.
61°
47°
24
Hist. Avg.
61°
47°
25
Hist. Avg.
61°
47°
26
Hist. Avg.
60°
47°
27
Hist. Avg.
60°
47°
28
Hist. Avg.
60°
47°
29
Hist. Avg.
59°
46°
30
Hist. Avg.
59°
46°
1
Hist. Avg.
59°
46°
2
Hist. Avg.
58°
46°
3
Hist. Avg.
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Apen
Apen's September 2026 forecast shows daily high temperatures ranging from 64° to 73°, with overnight lows between 47° and 56°. The average high for September is 68° 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 Apen. See also: October | November | December.