S
M
T
W
T
F
S
26
82°
70°
27
82°
68°
28
84°
68°
29
84°
69°
30
84°
70°
1
84°
70°
2
N/A
3
80°
67°
4
85°
68°
5
86°
70°
6
86°
73°
7
89°
71°
8
90°
70°
9
88°
71°
10
90°
72°
11
90°
72°
12
89°
70°
13
88°
69°
14
88°
71°
15
89°
70°
16
84°
70°
17
85°
70°
18
84°
72°
19
86°
73°
20
85°
73°
21
85°
72°
22
86°
71°
23
85°
68°
24
85°
73°
25
86°
73°
26
87°
74°
27
86°
74°
28
86°
73°
29
87°
74°
30
87°
73°
31
86°
74°
1
86°
74°
2
87°
74°
3
86°
75°
4
86°
74°
5
87°
75°
6
87°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Marco Island
Marco Island's May 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 67° and 75°. The average high for May is 86° with an average low of 72°. 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 Marco Island. See also: June | July | August.
