S
M
T
W
T
F
S
26
81°
54°
27
84°
63°
28
61°
55°
29
64°
46°
30
66°
39°
1
64°
43°
2
63°
41°
3
81°
39°
4
84°
54°
5
70°
46°
6
63°
41°
7
68°
39°
8
75°
46°
9
82°
55°
10
70°
48°
11
79°
43°
12
82°
50°
13
75°
50°
14
77°
45°
15
82°
61°
16
81°
68°
17
86°
66°
18
79°
66°
19
75°
61°
20
68°
55°
21
75°
55°
22
68°
63°
23
77°
61°
24
78°
59°
25
81°
65°
26
76°
65°
27
78°
66°
28
78°
61°
29
78°
58°
30
77°
53°
31
74°
54°
1
76°
54°
2
76°
56°
3
80°
57°
4
79°
58°
5
81°
58°
6
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sullivan
Sullivan's May 2026 forecast shows daily high temperatures ranging from 74° to 82°, with overnight lows between 53° and 66°. The average high for May is 78° 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 Sullivan. See also: June | July | August.
