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
88°
77°
3
83°
74°
4
84°
75°
5
86°
77°
6
88°
80°
7
89°
79°
8
88°
77°
9
89°
79°
10
89°
80°
11
88°
79°
12
89°
79°
13
87°
82°
14
88°
83°
15
84°
79°
16
83°
79°
17
84°
78°
18
83°
79°
19
83°
80°
20
84°
79°
21
84°
80°
22
85°
80°
23
84°
79°
24
84°
80°
25
85°
80°
26
84°
79°
27
85°
79°
28
84°
80°
29
84°
78°
30
83°
79°
31
83°
78°
1
84°
78°
2
84°
78°
3
85°
80°
4
84°
81°
5
86°
81°
6
85°
80°
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 89°, with overnight lows between 74° and 83°. The average high for May is 85° with an average low of 79°. 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.
