S
M
T
W
T
F
S
26
85°
67°
27
84°
68°
28
86°
68°
29
80°
65°
30
79°
65°
31
81°
69°
1
85°
71°
2
87°
72°
3
85°
71°
4
87°
70°
5
81°
69°
6
82°
71°
7
87°
70°
8
80°
71°
9
86°
69°
10
79°
66°
11
81°
68°
12
83°
70°
13
85°
68°
14
81°
64°
15
78°
63°
16
79°
66°
17
79°
68°
18
82°
70°
19
85°
66°
20
85°
70°
21
86°
66°
22
77°
62°
23
83°
68°
24
79°
67°
25
85°
66°
26
85°
68°
27
84°
60°
28
78°
59°
29
74°
58°
30
76°
60°
31
77°
65°
1
76°
67°
2
81°
59°
3
76°
56°
4
74°
57°
5
73°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Posen
Posen's August 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 56° and 72°. The average high for August is 81° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Posen. See also: September | October | November.