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
84°
78°
3
82°
74°
4
81°
77°
5
84°
77°
6
86°
78°
7
86°
77°
8
85°
78°
9
84°
78°
10
83°
77°
11
85°
78°
12
83°
76°
13
84°
77°
14
83°
76°
15
85°
75°
16
81°
76°
17
82°
75°
18
82°
77°
19
83°
78°
20
83°
78°
21
84°
77°
22
83°
77°
23
83°
76°
24
84°
78°
25
83°
78°
26
83°
79°
27
85°
79°
28
84°
78°
29
83°
78°
30
83°
77°
31
84°
78°
1
83°
79°
2
84°
78°
3
84°
79°
4
85°
78°
5
85°
79°
6
84°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Duck Key
Duck Key's May 2026 forecast shows daily high temperatures ranging from 81° to 86°, with overnight lows between 74° and 79°. The average high for May is 84° with an average low of 77°. 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 Duck Key. See also: June | July | August.
