S
M
T
W
T
F
S
26
82°
60°
27
85°
64°
28
77°
64°
29
79°
61°
30
67°
54°
1
65°
51°
2
71°
46°
3
73°
43°
4
80°
50°
5
73°
53°
6
68°
53°
7
70°
51°
8
72°
46°
9
78°
56°
10
77°
58°
11
75°
55°
12
81°
50°
13
84°
56°
14
77°
51°
15
83°
52°
16
84°
63°
17
87°
59°
18
87°
70°
19
90°
72°
20
84°
69°
21
81°
68°
22
82°
68°
23
84°
68°
24
83°
68°
25
75°
68°
26
83°
70°
27
83°
70°
28
83°
69°
29
79°
68°
30
82°
65°
31
81°
61°
1
80°
60°
2
81°
62°
3
79°
61°
4
76°
59°
5
81°
62°
6
82°
64°
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 76° to 83°, with overnight lows between 59° and 70°. The average high for May is 81° 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.
