S
M
T
W
T
F
S
26
72°
54°
27
70°
50°
28
72°
45°
29
81°
55°
30
72°
57°
1
68°
57°
2
59°
48°
3
68°
41°
4
77°
46°
5
79°
52°
6
82°
59°
7
74°
55°
8
73°
56°
9
77°
60°
10
78°
63°
11
79°
53°
12
73°
50°
13
77°
55°
14
81°
56°
15
84°
59°
16
85°
61°
17
82°
61°
18
84°
60°
19
85°
63°
20
84°
60°
21
82°
64°
22
81°
61°
23
78°
64°
24
78°
62°
25
80°
64°
26
79°
65°
27
80°
65°
28
82°
64°
29
83°
66°
30
81°
66°
31
80°
65°
1
81°
67°
2
83°
66°
3
84°
67°
4
82°
68°
5
82°
68°
6
83°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Marion
Marion's May 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 50° and 68°. The average high for May is 80° with an average low of 62°. 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 Marion. See also: June | July | August.