S
M
T
W
T
F
S
26
84°
74°
27
83°
74°
28
83°
74°
29
83°
75°
30
83°
73°
1
83°
74°
2
85°
80°
3
84°
73°
4
83°
72°
5
86°
74°
6
84°
75°
7
85°
79°
8
87°
78°
9
86°
80°
10
86°
81°
11
86°
79°
12
86°
79°
13
87°
74°
14
86°
77°
15
86°
78°
16
87°
76°
17
86°
78°
18
87°
80°
19
84°
76°
20
86°
74°
21
86°
78°
22
86°
78°
23
87°
80°
24
88°
81°
25
90°
81°
26
89°
82°
27
89°
80°
28
86°
79°
29
88°
78°
30
87°
77°
31
86°
78°
1
88°
76°
2
87°
77°
3
88°
78°
4
88°
77°
5
89°
78°
6
88°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Pine Key
Big Pine Key's May 2026 forecast shows daily high temperatures ranging from 86° to 90°, with overnight lows between 76° and 82°. The average high for May is 88° 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 Pine Key. See also: June | July | August.
