S
M
T
W
T
F
S
26
89°
74°
27
89°
74°
28
90°
75°
29
89°
75°
30
89°
74°
31
90°
75°
1
88°
73°
2
89°
75°
3
89°
75°
4
90°
74°
5
89°
75°
6
89°
75°
7
90°
74°
8
90°
75°
9
88°
74°
10
93°
73°
11
91°
73°
12
93°
73°
13
92°
74°
14
89°
73°
15
90°
72°
16
91°
71°
17
92°
71°
18
92°
72°
19
91°
72°
20
93°
71°
21
90°
70°
22
88°
71°
23
88°
71°
24
89°
70°
25
88°
70°
26
88°
69°
27
89°
69°
28
88°
70°
29
88°
70°
30
90°
69°
31
89°
70°
1
91°
71°
2
89°
70°
3
90°
71°
4
88°
70°
5
88°
70°
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 88° to 93°, with overnight lows between 69° and 75°. The average high for August is 90° with an average low of 72°. 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.
