S
M
T
W
T
F
S
26
62°
46°
27
61°
42°
28
62°
45°
29
62°
41°
30
61°
40°
1
64°
43°
2
64°
43°
3
63°
42°
4
65°
46°
5
73°
51°
6
74°
49°
7
70°
51°
8
75°
54°
9
76°
55°
10
76°
52°
11
68°
46°
12
64°
46°
13
66°
51°
14
67°
50°
15
67°
51°
16
68°
51°
17
66°
49°
18
77°
48°
19
70°
48°
20
72°
49°
21
70°
48°
22
69°
47°
23
70°
49°
24
71°
50°
25
69°
52°
26
71°
54°
27
73°
51°
28
73°
53°
29
74°
61°
30
80°
53°
31
82°
53°
1
73°
57°
2
77°
54°
3
81°
53°
4
77°
59°
5
83°
54°
6
75°
54°
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 61° to 83°, with overnight lows between 40° and 61°. The average high for May is 71° with an average low of 50°. 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.
