S
M
T
W
T
F
S
26
90°
81°
27
92°
80°
28
90°
79°
29
91°
80°
30
92°
79°
31
91°
81°
1
90°
79°
2
91°
80°
3
92°
81°
4
91°
81°
5
92°
80°
6
91°
80°
7
90°
81°
8
91°
82°
9
92°
81°
10
92°
80°
11
91°
81°
12
92°
81°
13
92°
80°
14
91°
80°
15
91°
81°
16
93°
79°
17
90°
78°
18
90°
80°
19
91°
81°
20
92°
80°
21
93°
79°
22
93°
80°
23
92°
80°
24
94°
79°
25
93°
81°
26
93°
81°
27
92°
80°
28
91°
81°
29
92°
80°
30
92°
80°
31
91°
79°
1
91°
80°
2
90°
79°
3
91°
77°
4
91°
79°
5
90°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Middle Keys
Middle Keys's August 2026 forecast shows daily high temperatures ranging from 90° to 94°, with overnight lows between 77° and 82°. The average high for August is 91° 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 August weather will actually feel in Middle Keys. See also: September | October | November.
