S
M
T
W
T
F
S
30
80°
60°
31
73°
56°
1
70°
58°
2
71°
53°
3
72°
53°
4
77°
62°
5
66°
55°
6
65°
48°
7
68°
45°
8
86°
54°
9
75°
60°
10
65°
47°
11
63°
47°
12
69°
52°
13
63°
58°
14
67°
47°
15
68°
54°
16
68°
52°
17
65°
51°
18
68°
51°
19
67°
50°
20
68°
51°
21
67°
50°
22
68°
51°
23
67°
52°
24
67°
50°
25
67°
50°
26
63°
47°
27
59°
47°
28
61°
46°
29
57°
42°
30
57°
41°
1
56°
40°
2
56°
40°
3
59°
41°
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 56° to 69°, with overnight lows between 40° and 58°. The average high for September is 64° 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 Poznan. See also: October | November | December.
