S
M
T
W
T
F
S
26
89°
79°
27
89°
80°
28
90°
80°
29
90°
79°
30
89°
80°
31
90°
80°
1
91°
79°
2
91°
80°
3
90°
81°
4
91°
80°
5
90°
79°
6
89°
80°
7
90°
80°
8
89°
79°
9
90°
77°
10
89°
79°
11
90°
80°
12
90°
80°
13
91°
81°
14
90°
80°
15
90°
79°
16
89°
80°
17
92°
80°
18
91°
77°
19
90°
78°
20
89°
77°
21
90°
79°
22
88°
78°
23
88°
78°
24
89°
79°
25
89°
78°
26
90°
79°
27
89°
77°
28
88°
78°
29
89°
77°
30
88°
78°
31
89°
77°
1
89°
77°
2
88°
80°
3
Hist. Avg.
91°
79°
4
Hist. Avg.
91°
79°
5
Hist. Avg.
91°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Islamorada
Islamorada's August 2026 forecast shows daily high temperatures ranging from 88° to 92°, with overnight lows between 77° and 81°. The average high for August is 90° with an average low of 79°. 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 Islamorada. See also: September | October | November.
