S
M
T
W
T
F
S
26
90°
72°
27
92°
72°
28
91°
73°
29
92°
71°
30
91°
72°
31
91°
71°
1
89°
70°
2
83°
67°
3
82°
70°
4
81°
70°
5
83°
69°
6
83°
70°
7
84°
70°
8
84°
68°
9
85°
69°
10
86°
70°
11
85°
70°
12
84°
69°
13
86°
68°
14
92°
68°
15
91°
68°
16
89°
69°
17
88°
67°
18
89°
68°
19
88°
62°
20
83°
60°
21
81°
59°
22
80°
60°
23
81°
60°
24
82°
61°
25
82°
67°
26
83°
62°
27
88°
66°
28
88°
67°
29
90°
67°
30
90°
66°
31
89°
66°
1
83°
65°
2
82°
61°
3
79°
58°
4
79°
60°
5
80°
65°
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 79° to 92°, with overnight lows between 58° and 73°. The average high for August is 86° with an average low of 67°. 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.