S
M
T
W
T
F
S
26
85°
59°
27
85°
60°
28
84°
61°
29
86°
61°
30
83°
58°
31
77°
56°
1
77°
54°
2
79°
58°
3
82°
60°
4
82°
58°
5
85°
60°
6
84°
61°
7
83°
61°
8
86°
54°
9
78°
54°
10
84°
56°
11
85°
59°
12
84°
56°
13
79°
56°
14
80°
54°
15
80°
55°
16
81°
52°
17
78°
53°
18
79°
56°
19
80°
51°
20
77°
52°
21
77°
57°
22
78°
60°
23
77°
59°
24
76°
53°
25
75°
53°
26
77°
57°
27
80°
59°
28
85°
56°
29
82°
57°
30
83°
55°
31
84°
58°
1
83°
59°
2
84°
59°
3
83°
54°
4
82°
55°
5
81°
59°
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 75° to 86°, with overnight lows between 51° and 61°. The average high for August is 81° 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 Riverdale. See also: September | October | November.