S
M
T
W
T
F
S
26
97°
75°
27
99°
74°
28
89°
68°
29
88°
66°
30
89°
69°
31
80°
66°
1
82°
65°
2
86°
66°
3
87°
67°
4
87°
68°
5
88°
68°
6
89°
66°
7
83°
66°
8
85°
66°
9
87°
70°
10
87°
70°
11
82°
70°
12
87°
69°
13
86°
67°
14
81°
67°
15
82°
70°
16
82°
70°
17
85°
69°
18
83°
69°
19
81°
68°
20
81°
69°
21
82°
68°
22
85°
69°
23
88°
70°
24
87°
68°
25
86°
69°
26
89°
71°
27
89°
70°
28
88°
69°
29
87°
69°
30
87°
68°
31
80°
66°
1
77°
65°
2
77°
66°
3
78°
67°
4
83°
68°
5
86°
67°
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 77° to 99°, with overnight lows between 65° and 75°. The average high for August is 85° with an average low of 68°. 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.
