S
M
T
W
T
F
S
26
93°
75°
27
94°
75°
28
95°
75°
29
94°
78°
30
93°
73°
31
94°
71°
1
93°
75°
2
81°
72°
3
85°
71°
4
89°
70°
5
91°
75°
6
92°
74°
7
90°
73°
8
92°
72°
9
93°
72°
10
95°
71°
11
94°
76°
12
94°
73°
13
96°
78°
14
95°
78°
15
95°
76°
16
97°
74°
17
99°
74°
18
93°
72°
19
96°
74°
20
98°
76°
21
96°
75°
22
94°
71°
23
92°
69°
24
92°
69°
25
94°
70°
26
95°
72°
27
85°
71°
28
85°
71°
29
89°
72°
30
90°
73°
31
90°
72°
1
94°
70°
2
91°
69°
3
90°
67°
4
91°
68°
5
90°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Shannon
Shannon's August 2026 forecast shows daily high temperatures ranging from 85° to 95°, with overnight lows between 67° and 73°. The average high for August is 90° with an average low of 70°. 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 Shannon. See also: September | October | November.