S
M
T
W
T
F
S
26
84°
67°
27
86°
67°
28
87°
68°
29
88°
69°
30
87°
68°
31
86°
67°
1
87°
68°
2
88°
69°
3
88°
68°
4
86°
67°
5
86°
67°
6
87°
68°
7
87°
66°
8
84°
62°
9
81°
63°
10
81°
66°
11
86°
68°
12
87°
69°
13
88°
68°
14
88°
67°
15
86°
66°
16
84°
63°
17
81°
64°
18
81°
64°
19
85°
62°
20
84°
63°
21
85°
64°
22
84°
60°
23
80°
57°
24
76°
56°
25
76°
55°
26
77°
55°
27
77°
54°
28
78°
54°
29
78°
58°
30
80°
62°
31
80°
62°
1
83°
61°
2
84°
60°
3
83°
53°
4
76°
56°
5
75°
60°
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 75° to 88°, with overnight lows between 53° and 69°. The average high for August is 83° with an average low of 63°. 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.
