S
M
T
W
T
F
S
26
80°
44°
27
70°
56°
28
63°
48°
29
61°
39°
30
61°
36°
1
59°
35°
2
60°
37°
3
72°
42°
4
82°
48°
5
55°
45°
6
60°
39°
7
67°
37°
8
64°
44°
9
80°
49°
10
68°
43°
11
73°
42°
12
85°
49°
13
73°
48°
14
76°
42°
15
81°
53°
16
83°
63°
17
87°
65°
18
76°
64°
19
72°
52°
20
69°
47°
21
73°
46°
22
69°
56°
23
80°
58°
24
83°
61°
25
85°
54°
26
85°
56°
27
89°
58°
28
86°
57°
29
82°
58°
30
85°
58°
31
82°
57°
1
79°
55°
2
87°
55°
3
84°
58°
4
82°
63°
5
84°
60°
6
84°
61°
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 79° to 89°, with overnight lows between 55° and 63°. The average high for May is 84° 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.
