S
M
T
W
T
F
S
26
82°
63°
27
78°
58°
28
81°
61°
29
82°
59°
30
78°
57°
31
81°
61°
1
80°
57°
2
79°
56°
3
78°
55°
4
78°
53°
5
79°
54°
6
79°
56°
7
80°
55°
8
81°
57°
9
83°
57°
10
78°
60°
11
82°
62°
12
84°
63°
13
84°
62°
14
83°
56°
15
83°
54°
16
77°
57°
17
77°
60°
18
76°
54°
19
76°
53°
20
75°
54°
21
76°
60°
22
80°
58°
23
83°
59°
24
82°
60°
25
81°
52°
26
81°
52°
27
74°
53°
28
74°
52°
29
75°
58°
30
79°
59°
31
81°
59°
1
81°
52°
2
77°
52°
3
79°
55°
4
74°
56°
5
75°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rio
Rio's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 52° and 63°. The average high for August is 79° with an average low of 57°. 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 Rio. See also: September | October | November.
