S
M
T
W
T
F
S
30
81°
72°
31
93°
73°
1
93°
73°
2
97°
72°
3
97°
75°
4
97°
72°
5
95°
75°
6
84°
61°
7
83°
63°
8
93°
71°
9
85°
60°
10
80°
55°
11
83°
64°
12
84°
61°
13
79°
61°
14
78°
58°
15
75°
55°
16
78°
57°
17
76°
57°
18
76°
56°
19
76°
53°
20
80°
59°
21
79°
59°
22
77°
58°
23
79°
58°
24
79°
57°
25
80°
59°
26
80°
59°
27
79°
58°
28
78°
59°
29
78°
58°
30
76°
57°
1
75°
51°
2
65°
47°
3
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wapello
Wapello's September 2026 forecast shows daily high temperatures ranging from 64° to 93°, with overnight lows between 43° and 71°. The average high for September is 79° with an average low of 58°. 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 Wapello. See also: October | November | December.