S
M
T
W
T
F
S
26
81°
62°
27
84°
64°
28
83°
68°
29
80°
61°
30
83°
55°
31
85°
57°
1
78°
66°
2
83°
69°
3
83°
63°
4
87°
59°
5
88°
68°
6
86°
68°
7
87°
67°
8
85°
66°
9
86°
67°
10
82°
69°
11
N/A
12
81°
69°
13
81°
70°
14
82°
63°
15
84°
66°
16
89°
71°
17
83°
63°
18
81°
62°
19
82°
64°
20
83°
66°
21
82°
65°
22
79°
63°
23
80°
63°
24
79°
62°
25
79°
60°
26
82°
60°
27
86°
65°
28
86°
65°
29
83°
62°
30
79°
59°
31
78°
63°
1
78°
65°
2
79°
65°
3
81°
64°
4
83°
65°
5
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Marietta
Marietta's August 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 59° and 71°. The average high for August is 82° with an average low of 64°. 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 Marietta. See also: September | October | November.
