S
M
T
W
T
F
S
26
87°
79°
27
85°
75°
28
86°
77°
29
85°
79°
30
85°
78°
1
87°
77°
2
87°
82°
3
86°
79°
4
86°
77°
5
90°
77°
6
86°
76°
7
89°
82°
8
92°
82°
9
89°
83°
10
90°
84°
11
89°
84°
12
89°
79°
13
89°
79°
14
88°
78°
15
87°
78°
16
88°
80°
17
89°
80°
18
90°
81°
19
89°
80°
20
88°
79°
21
88°
82°
22
87°
80°
23
88°
81°
24
88°
83°
25
89°
82°
26
84°
79°
27
85°
79°
28
83°
78°
29
84°
80°
30
84°
80°
31
85°
77°
1
84°
79°
2
84°
80°
3
85°
80°
4
84°
80°
5
84°
79°
6
86°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Coppitt Key
Big Coppitt Key's May 2026 forecast shows daily high temperatures ranging from 83° to 90°, with overnight lows between 77° and 83°. The average high for May is 87° with an average low of 80°. 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 Big Coppitt Key. See also: June | July | August.
