S
M
T
W
T
F
S
26
58°
43°
27
71°
39°
28
58°
42°
29
59°
49°
30
65°
48°
1
67°
38°
2
60°
45°
3
62°
42°
4
75°
39°
5
84°
58°
6
69°
56°
7
66°
50°
8
68°
42°
9
64°
51°
10
75°
49°
11
64°
48°
12
68°
38°
13
73°
53°
14
60°
51°
15
71°
50°
16
83°
47°
17
87°
60°
18
96°
63°
19
95°
68°
20
91°
66°
21
70°
55°
22
66°
52°
23
53°
49°
24
63°
50°
25
74°
56°
26
81°
61°
27
79°
63°
28
79°
55°
29
77°
55°
30
74°
53°
31
70°
52°
1
73°
55°
2
76°
56°
3
77°
61°
4
79°
60°
5
80°
61°
6
79°
58°
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 70° to 81°, with overnight lows between 52° and 63°. The average high for May is 77° with an average low of 57°. 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.
