S
M
T
W
T
F
S
26
47°
30°
27
47°
36°
28
42°
35°
29
43°
30°
30
42°
26°
1
44°
36°
2
43°
36°
3
47°
33°
4
49°
36°
5
47°
38°
6
39°
32°
7
42°
30°
8
44°
29°
9
52°
33°
10
53°
35°
11
46°
35°
12
46°
29°
13
46°
33°
14
47°
32°
15
42°
31°
16
52°
30°
17
53°
30°
18
50°
32°
19
52°
35°
20
49°
30°
21
51°
32°
22
50°
28°
23
54°
29°
24
53°
32°
25
57°
31°
26
52°
28°
27
51°
29°
28
51°
28°
29
52°
28°
30
53°
29°
31
55°
31°
1
57°
33°
2
57°
36°
3
58°
35°
4
58°
34°
5
60°
37°
6
56°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lagoon
Lagoon's May 2026 forecast shows daily high temperatures ranging from 42° to 60°, with overnight lows between 28° and 37°. The average high for May is 52° with an average low of 31°. 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 Lagoon. See also: June | July | August.