S
M
T
W
T
F
S
30
91°
71°
31
90°
71°
1
89°
70°
2
91°
71°
3
91°
71°
4
85°
70°
5
87°
68°
6
89°
67°
7
89°
68°
8
90°
69°
9
90°
70°
10
89°
70°
11
90°
68°
12
90°
68°
13
88°
69°
14
87°
65°
15
89°
67°
16
90°
67°
17
89°
68°
18
89°
67°
19
90°
67°
20
89°
66°
21
88°
65°
22
84°
66°
23
83°
65°
24
85°
65°
25
85°
64°
26
84°
64°
27
86°
63°
28
84°
64°
29
81°
64°
30
83°
63°
1
84°
63°
2
84°
56°
3
79°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Monroeville
Monroeville's September 2026 forecast shows daily high temperatures ranging from 79° to 91°, with overnight lows between 54° and 71°. The average high for September is 87° 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 September weather will actually feel in Monroeville. See also: October | November | December.