S
M
T
W
T
F
S
30
72°
49°
31
78°
48°
1
71°
48°
2
71°
50°
3
72°
47°
4
70°
47°
5
70°
46°
6
71°
46°
7
69°
44°
8
69°
45°
9
70°
46°
10
69°
53°
11
74°
49°
12
67°
47°
13
66°
45°
14
66°
51°
15
73°
51°
16
73°
48°
17
67°
49°
18
70°
50°
19
72°
51°
20
72°
51°
21
73°
50°
22
72°
51°
23
71°
50°
24
72°
47°
25
71°
44°
26
62°
43°
27
63°
47°
28
62°
46°
29
69°
47°
30
69°
45°
1
Hist. Avg.
63°
46°
2
Hist. Avg.
63°
46°
3
Hist. Avg.
63°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Postmünster
Postmünster's September 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 43° and 53°. The average high for September is 70° with an average low of 48°. 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 Postmünster. See also: October | November | December.
