S
M
T
W
T
F
S
29
83°
76°
30
83°
73°
31
83°
76°
1
83°
77°
2
84°
77°
3
83°
78°
4
83°
77°
5
84°
76°
6
84°
76°
7
84°
76°
8
84°
75°
9
85°
74°
10
84°
75°
11
84°
75°
12
83°
74°
13
83°
73°
14
83°
75°
15
81°
71°
16
82°
73°
17
85°
76°
18
86°
75°
19
85°
75°
20
84°
75°
21
83°
75°
22
82°
72°
23
83°
74°
24
86°
76°
25
87°
77°
26
85°
77°
27
87°
76°
28
85°
81°
29
83°
78°
30
84°
77°
1
82°
78°
2
82°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Big Coppitt Key
Big Coppitt Key's April 2026 forecast shows daily high temperatures ranging from 81° to 87°, with overnight lows between 71° and 81°. The average high for April is 84° with an average low of 76°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Big Coppitt Key. See also: May | June | July.