S
M
T
W
T
F
S
26
60°
32°
27
63°
31°
28
66°
29°
29
70°
39°
30
71°
40°
1
75°
38°
2
81°
40°
3
83°
42°
4
82°
44°
5
79°
53°
6
80°
40°
7
82°
52°
8
81°
46°
9
79°
46°
10
89°
39°
11
87°
52°
12
97°
49°
13
89°
46°
14
75°
41°
15
73°
47°
16
64°
40°
17
61°
38°
18
69°
40°
19
73°
38°
20
77°
39°
21
76°
47°
22
81°
43°
23
89°
43°
24
89°
58°
25
92°
57°
26
78°
46°
27
82°
52°
28
83°
51°
29
72°
54°
30
81°
51°
31
83°
50°
1
90°
54°
2
93°
57°
3
93°
60°
4
92°
58°
5
91°
54°
6
88°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Three Island State Park
Three Island State Park's May 2026 forecast shows daily high temperatures ranging from 72° to 93°, with overnight lows between 46° and 60°. The average high for May is 86° with an average low of 54°. 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 Three Island State Park. See also: June | July | August.
