S
M
T
W
T
F
S
26
82°
54°
27
68°
59°
28
68°
57°
29
65°
49°
30
63°
42°
1
59°
46°
2
58°
41°
3
68°
38°
4
76°
55°
5
69°
46°
6
61°
46°
7
65°
40°
8
73°
49°
9
76°
54°
10
71°
55°
11
73°
47°
12
80°
47°
13
72°
54°
14
70°
44°
15
79°
52°
16
81°
64°
17
85°
66°
18
81°
66°
19
86°
67°
20
67°
58°
21
67°
56°
22
67°
60°
23
73°
61°
24
77°
60°
25
80°
58°
26
75°
64°
27
81°
68°
28
87°
66°
29
82°
66°
30
82°
60°
31
79°
62°
1
82°
60°
2
81°
58°
3
82°
58°
4
83°
67°
5
82°
66°
6
81°
64°
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 79° to 83°, with overnight lows between 58° and 67°. The average high for May is 82° 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.