S
M
T
W
T
F
S
26
62°
40°
27
58°
44°
28
62°
46°
29
47°
33°
30
47°
31°
1
45°
28°
2
61°
26°
3
71°
45°
4
76°
39°
5
54°
32°
6
52°
29°
7
54°
29°
8
67°
31°
9
63°
36°
10
59°
32°
11
57°
28°
12
75°
38°
13
63°
40°
14
69°
34°
15
82°
49°
16
85°
55°
17
55°
46°
18
82°
51°
19
68°
52°
20
62°
43°
21
60°
38°
22
67°
46°
23
68°
55°
24
80°
56°
25
83°
60°
26
87°
56°
27
84°
53°
28
79°
50°
29
79°
48°
30
72°
44°
31
72°
49°
1
77°
51°
2
76°
51°
3
79°
53°
4
77°
52°
5
75°
51°
6
72°
56°
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 68° to 87°, with overnight lows between 44° and 60°. The average high for May is 77° with an average low of 52°. 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.