S
M
T
W
T
F
S
31
95°
75°
1
94°
77°
2
87°
78°
3
82°
77°
4
81°
76°
5
83°
78°
6
84°
77°
7
85°
78°
8
86°
80°
9
85°
79°
10
84°
78°
11
85°
78°
12
85°
80°
13
84°
78°
14
85°
79°
15
87°
83°
16
89°
80°
17
89°
81°
18
90°
80°
19
89°
81°
20
90°
81°
21
90°
80°
22
92°
81°
23
92°
81°
24
91°
80°
25
92°
81°
26
91°
81°
27
92°
80°
28
91°
81°
29
91°
81°
30
92°
80°
1
91°
81°
2
90°
81°
3
90°
80°
4
91°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Key Biscayne
Key Biscayne's June 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 76° and 83°. The average high for June is 88° with an average low of 80°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Key Biscayne. See also: July | August | September.
