S
M
T
W
T
F
S
30
71°
58°
31
70°
61°
1
79°
66°
2
83°
65°
3
80°
65°
4
76°
60°
5
74°
56°
6
72°
52°
7
75°
49°
8
78°
53°
9
72°
64°
10
75°
62°
11
N/A
12
79°
66°
13
77°
58°
14
68°
47°
15
72°
62°
16
77°
62°
17
74°
57°
18
69°
56°
19
65°
53°
20
66°
52°
21
67°
53°
22
68°
55°
23
69°
56°
24
70°
51°
25
62°
48°
26
65°
53°
27
70°
55°
28
68°
52°
29
62°
47°
30
66°
56°
1
69°
54°
2
63°
52°
3
67°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hannibal
Hannibal's September 2026 forecast shows daily high temperatures ranging from 62° to 79°, with overnight lows between 47° and 66°. The average high for September is 69° with an average low of 55°. 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 Hannibal. See also: October | November | December.
