S
M
T
W
T
F
S
26
82°
62°
27
77°
60°
28
69°
57°
29
84°
62°
30
73°
59°
1
68°
56°
2
68°
45°
3
70°
45°
4
79°
53°
5
79°
58°
6
81°
62°
7
71°
48°
8
68°
50°
9
75°
57°
10
76°
59°
11
73°
59°
12
74°
58°
13
75°
59°
14
74°
59°
15
77°
57°
16
73°
56°
17
75°
59°
18
76°
61°
19
78°
61°
20
77°
62°
21
74°
57°
22
76°
55°
23
72°
54°
24
72°
56°
25
74°
58°
26
75°
56°
27
73°
55°
28
74°
57°
29
75°
58°
30
76°
61°
31
77°
64°
1
78°
65°
2
76°
64°
3
77°
64°
4
77°
61°
5
81°
65°
6
83°
66°
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 68° to 83°, with overnight lows between 45° and 66°. The average high for May is 75° with an average low of 58°. 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.
