S
M
T
W
T
F
S
26
67°
50°
27
70°
46°
28
75°
48°
29
81°
48°
30
86°
51°
1
84°
54°
2
77°
55°
3
69°
54°
4
62°
53°
5
68°
53°
6
74°
59°
7
83°
56°
8
86°
55°
9
88°
58°
10
88°
58°
11
93°
57°
12
93°
59°
13
82°
57°
14
90°
54°
15
90°
57°
16
85°
58°
17
82°
58°
18
86°
55°
19
93°
58°
20
96°
62°
21
98°
67°
22
97°
62°
23
91°
59°
24
88°
58°
25
83°
60°
26
81°
58°
27
84°
57°
28
84°
59°
29
87°
58°
30
81°
56°
31
87°
60°
1
91°
62°
2
91°
63°
3
92°
63°
4
93°
64°
5
93°
63°
6
92°
63°
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 81° to 98°, with overnight lows between 55° and 67°. The average high for May is 89° with an average low of 60°. 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.
