S
M
T
W
T
F
S
26
87°
81°
27
88°
78°
28
87°
78°
29
88°
79°
30
89°
78°
31
88°
79°
1
87°
78°
2
88°
78°
3
88°
77°
4
89°
78°
5
89°
78°
6
87°
77°
7
87°
78°
8
88°
79°
9
89°
78°
10
89°
77°
11
88°
78°
12
89°
78°
13
88°
79°
14
87°
78°
15
88°
77°
16
89°
77°
17
86°
79°
18
88°
79°
19
87°
78°
20
89°
79°
21
90°
78°
22
90°
77°
23
89°
78°
24
90°
79°
25
90°
80°
26
89°
80°
27
90°
78°
28
87°
79°
29
89°
78°
30
89°
79°
31
88°
79°
1
89°
78°
2
88°
78°
3
89°
77°
4
88°
78°
5
87°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Downtown Miami
Downtown Miami's August 2026 forecast shows daily high temperatures ranging from 86° to 90°, with overnight lows between 77° and 81°. The average high for August is 88° with an average low of 78°. 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 Downtown Miami. See also: September | October | November.
