S
M
T
W
T
F
S
26
87°
68°
27
88°
68°
28
87°
67°
29
86°
67°
30
86°
63°
31
79°
61°
1
79°
61°
2
80°
62°
3
82°
63°
4
82°
61°
5
83°
61°
6
84°
64°
7
83°
67°
8
83°
66°
9
81°
66°
10
84°
60°
11
83°
60°
12
84°
61°
13
83°
65°
14
84°
66°
15
86°
65°
16
86°
67°
17
87°
66°
18
86°
65°
19
84°
59°
20
81°
58°
21
79°
58°
22
79°
59°
23
80°
57°
24
79°
59°
25
81°
58°
26
85°
58°
27
83°
59°
28
80°
62°
29
80°
60°
30
77°
61°
31
82°
63°
1
84°
57°
2
82°
56°
3
77°
55°
4
78°
57°
5
77°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Riverdale
Riverdale's August 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 55° and 68°. The average high for August is 82° with an average low of 62°. 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 Riverdale. See also: September | October | November.