S
M
T
W
T
F
S
26
26°
18°
27
41°
9°
28
51°
18°
29
59°
22°
30
67°
28°
1
71°
38°
2
66°
39°
3
68°
41°
4
49°
27°
5
48°
22°
6
62°
20°
7
69°
39°
8
70°
38°
9
64°
37°
10
72°
37°
11
67°
37°
12
73°
34°
13
80°
40°
14
63°
40°
15
61°
34°
16
41°
30°
17
53°
30°
18
60°
34°
19
63°
41°
20
61°
40°
21
62°
42°
22
60°
37°
23
63°
37°
24
69°
43°
25
71°
40°
26
64°
41°
27
67°
42°
28
72°
45°
29
66°
42°
30
65°
47°
31
67°
46°
1
69°
47°
2
70°
48°
3
71°
48°
4
71°
49°
5
66°
48°
6
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sullivan Lake
Sullivan Lake's May 2026 forecast shows daily high temperatures ranging from 41° to 72°, with overnight lows between 30° and 49°. The average high for May is 64° with an average low of 42°. 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 Lake. See also: June | July | August.
