S
M
T
W
T
F
S
26
92°
76°
27
91°
75°
28
91°
78°
29
94°
78°
30
95°
78°
31
94°
77°
1
93°
78°
2
93°
76°
3
94°
76°
4
92°
76°
5
91°
77°
6
90°
78°
7
92°
77°
8
91°
82°
9
91°
83°
10
92°
84°
11
92°
81°
12
94°
79°
13
93°
76°
14
93°
78°
15
93°
78°
16
92°
81°
17
95°
77°
18
100°
80°
19
95°
77°
20
94°
78°
21
95°
78°
22
94°
78°
23
94°
76°
24
91°
77°
25
92°
78°
26
91°
80°
27
94°
79°
28
92°
77°
29
86°
77°
30
91°
80°
31
90°
81°
1
90°
82°
2
89°
83°
3
88°
83°
4
89°
83°
5
90°
80°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Key Largo
Key Largo's August 2026 forecast shows daily high temperatures ranging from 88° to 90°, with overnight lows between 80° and 83°. The average high for August is 89° with an average low of 82°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Key Largo. See also: September | October | November.
