S
M
T
W
T
F
S
31
79°
54°
1
81°
56°
2
69°
62°
3
77°
55°
4
79°
58°
5
70°
59°
6
73°
55°
7
74°
47°
8
73°
52°
9
78°
50°
10
75°
59°
11
72°
55°
12
70°
54°
13
68°
46°
14
66°
50°
15
71°
50°
16
66°
54°
17
64°
52°
18
69°
55°
19
77°
61°
20
86°
55°
21
77°
59°
22
59°
51°
23
63°
42°
24
65°
41°
25
59°
46°
26
61°
51°
27
67°
49°
28
66°
45°
29
63°
42°
30
55°
39°
1
54°
39°
2
57°
35°
3
61°
35°
4
55°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Potsdam
Potsdam's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Potsdam. See also: October | November | December.