S
M
T
W
T
F
S
30
69°
55°
31
69°
56°
1
75°
57°
2
76°
56°
3
77°
57°
4
75°
54°
5
72°
55°
6
73°
54°
7
72°
54°
8
72°
53°
9
71°
53°
10
71°
52°
11
70°
52°
12
67°
47°
13
64°
44°
14
63°
46°
15
62°
47°
16
64°
51°
17
69°
51°
18
68°
52°
19
69°
52°
20
70°
50°
21
68°
51°
22
66°
46°
23
64°
51°
24
65°
48°
25
68°
46°
26
60°
50°
27
66°
51°
28
67°
46°
29
67°
46°
30
61°
44°
1
59°
43°
2
58°
40°
3
59°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Poznan
Poznan's September 2026 forecast shows daily high temperatures ranging from 58° to 77°, with overnight lows between 40° and 57°. The average high for September is 68° with an average low of 50°. 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 Poznan. See also: October | November | December.
