S
M
T
W
T
F
S
26
87°
69°
27
86°
68°
28
84°
73°
29
85°
67°
30
88°
70°
1
88°
71°
2
92°
73°
3
80°
73°
4
83°
72°
5
86°
74°
6
84°
77°
7
85°
74°
8
83°
78°
9
84°
80°
10
87°
80°
11
89°
78°
12
88°
78°
13
89°
79°
14
88°
81°
15
88°
76°
16
87°
78°
17
87°
79°
18
88°
74°
19
84°
77°
20
84°
77°
21
85°
76°
22
84°
77°
23
85°
76°
24
84°
77°
25
84°
77°
26
85°
78°
27
87°
78°
28
85°
77°
29
84°
78°
30
85°
77°
31
84°
78°
1
83°
78°
2
85°
77°
3
85°
77°
4
86°
76°
5
85°
78°
6
84°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Key Largo
Key Largo's May 2026 forecast shows daily high temperatures ranging from 83° to 89°, with overnight lows between 74° and 81°. The average high for May is 85° 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 Key Largo. See also: June | July | August.
