S
M
T
W
T
F
S
26
91°
71°
27
91°
72°
28
90°
72°
29
86°
71°
30
91°
72°
31
91°
72°
1
90°
73°
2
92°
73°
3
92°
72°
4
91°
72°
5
92°
71°
6
92°
72°
7
91°
72°
8
92°
73°
9
93°
72°
10
92°
72°
11
91°
71°
12
91°
71°
13
89°
70°
14
88°
69°
15
85°
65°
16
85°
65°
17
86°
68°
18
86°
69°
19
87°
70°
20
90°
70°
21
86°
69°
22
89°
70°
23
90°
70°
24
91°
68°
25
88°
69°
26
87°
69°
27
88°
67°
28
87°
68°
29
90°
67°
30
87°
68°
31
86°
68°
1
86°
67°
2
87°
67°
3
83°
61°
4
83°
59°
5
81°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Marietta
Marietta's August 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 59° and 73°. The average high for August is 89° with an average low of 69°. 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.
