S
M
T
W
T
F
S
30
92°
72°
31
91°
71°
1
92°
71°
2
91°
72°
3
91°
71°
4
90°
72°
5
92°
71°
6
91°
71°
7
89°
65°
8
88°
66°
9
86°
66°
10
87°
64°
11
90°
67°
12
89°
66°
13
90°
66°
14
90°
65°
15
89°
59°
16
81°
61°
17
80°
64°
18
86°
64°
19
87°
63°
20
86°
64°
21
86°
63°
22
83°
62°
23
81°
63°
24
84°
62°
25
84°
62°
26
83°
61°
27
79°
61°
28
82°
57°
29
76°
56°
30
75°
55°
1
73°
58°
2
74°
59°
3
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Posey
Posey's September 2026 forecast shows daily high temperatures ranging from 73° to 92°, with overnight lows between 55° and 72°. The average high for September is 85° with an average low of 64°. 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 Posey. See also: October | November | December.
