S
M
T
W
T
F
S
26
82°
60°
27
82°
58°
28
74°
66°
29
73°
64°
30
78°
63°
31
82°
58°
1
87°
70°
2
78°
66°
3
76°
63°
4
82°
64°
5
83°
68°
6
82°
67°
7
82°
67°
8
81°
66°
9
80°
64°
10
78°
62°
11
76°
61°
12
74°
60°
13
77°
61°
14
76°
62°
15
74°
59°
16
73°
58°
17
82°
64°
18
74°
62°
19
75°
64°
20
75°
59°
21
73°
57°
22
75°
64°
23
80°
65°
24
79°
64°
25
76°
64°
26
77°
63°
27
78°
64°
28
77°
63°
29
77°
64°
30
76°
63°
31
78°
62°
1
77°
58°
2
71°
57°
3
70°
55°
4
70°
56°
5
72°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hannibal
Hannibal's August 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 55° and 70°. The average high for August is 77° with an average low of 62°. 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 Hannibal. See also: September | October | November.
