S
M
T
W
T
F
S
26
87°
66°
27
86°
67°
28
87°
69°
29
86°
67°
30
84°
71°
31
87°
67°
1
87°
71°
2
86°
69°
3
87°
71°
4
87°
71°
5
86°
70°
6
85°
70°
7
83°
69°
8
83°
71°
9
84°
70°
10
87°
71°
11
87°
70°
12
86°
69°
13
87°
67°
14
83°
68°
15
85°
66°
16
84°
68°
17
87°
70°
18
86°
68°
19
84°
66°
20
86°
68°
21
83°
66°
22
83°
66°
23
Hist. Avg.
85°
67°
24
Hist. Avg.
85°
67°
25
Hist. Avg.
84°
67°
26
Hist. Avg.
84°
67°
27
Hist. Avg.
84°
67°
28
Hist. Avg.
84°
67°
29
Hist. Avg.
84°
66°
30
Hist. Avg.
84°
66°
31
Hist. Avg.
84°
66°
1
Hist. Avg.
84°
66°
2
Hist. Avg.
83°
66°
3
Hist. Avg.
83°
65°
4
Hist. Avg.
83°
65°
5
Hist. Avg.
83°
65°
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 83° to 87°, with overnight lows between 66° and 71°. The average high for August is 85° 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.
