S
M
T
W
T
F
S
26
56°
41°
27
53°
41°
28
53°
36°
29
61°
33°
30
55°
39°
1
56°
32°
2
71°
30°
3
73°
46°
4
66°
43°
5
54°
32°
6
59°
26°
7
67°
32°
8
78°
43°
9
68°
42°
10
71°
34°
11
86°
42°
12
77°
50°
13
81°
41°
14
84°
55°
15
90°
47°
16
82°
48°
17
81°
53°
18
52°
45°
19
58°
40°
20
62°
35°
21
71°
48°
22
71°
51°
23
77°
49°
24
84°
61°
25
86°
62°
26
88°
60°
27
85°
62°
28
83°
63°
29
76°
58°
30
79°
57°
31
82°
56°
1
81°
54°
2
80°
56°
3
81°
59°
4
81°
58°
5
83°
59°
6
81°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Vermillion
Vermillion's May 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 54° and 63°. The average high for May is 82° with an average low of 59°. 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 Vermillion. See also: June | July | August.