S
M
T
W
T
F
S
26
92°
73°
27
98°
67°
28
92°
67°
29
93°
70°
30
96°
72°
31
94°
74°
1
94°
69°
2
96°
67°
3
93°
69°
4
91°
67°
5
90°
66°
6
91°
67°
7
92°
68°
8
92°
68°
9
93°
69°
10
93°
70°
11
94°
73°
12
95°
73°
13
97°
72°
14
97°
71°
15
96°
72°
16
96°
70°
17
93°
69°
18
94°
69°
19
97°
68°
20
96°
69°
21
95°
66°
22
93°
66°
23
94°
69°
24
96°
71°
25
95°
70°
26
95°
67°
27
92°
70°
28
95°
70°
29
92°
69°
30
93°
70°
31
93°
70°
1
92°
68°
2
93°
67°
3
91°
66°
4
92°
62°
5
87°
60°
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 87° to 98°, with overnight lows between 60° and 74°. The average high for August is 94° 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.
