S
M
T
W
T
F
S
26
85°
63°
27
91°
64°
28
82°
58°
29
66°
55°
30
68°
54°
1
73°
50°
2
78°
44°
3
83°
47°
4
82°
58°
5
85°
53°
6
64°
47°
7
76°
45°
8
82°
47°
9
88°
61°
10
72°
57°
11
79°
54°
12
82°
52°
13
88°
56°
14
89°
64°
15
89°
72°
16
86°
71°
17
86°
72°
18
90°
74°
19
80°
57°
20
79°
58°
21
72°
63°
22
84°
66°
23
84°
63°
24
86°
63°
25
88°
64°
26
83°
67°
27
75°
65°
28
83°
64°
29
86°
66°
30
87°
64°
31
82°
61°
1
80°
62°
2
82°
62°
3
80°
59°
4
83°
63°
5
86°
66°
6
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Marietta
Marietta's May 2026 forecast shows daily high temperatures ranging from 75° to 88°, with overnight lows between 59° and 67°. The average high for May is 83° 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 May weather will actually feel in Marietta. See also: June | July | August.
