S
M
T
W
T
F
S
26
100°
68°
27
86°
66°
28
94°
59°
29
92°
65°
30
91°
61°
31
94°
57°
1
100°
60°
2
101°
67°
3
81°
54°
4
78°
47°
5
89°
50°
6
94°
55°
7
97°
60°
8
99°
58°
9
98°
61°
10
95°
59°
11
95°
63°
12
77°
64°
13
76°
58°
14
81°
55°
15
81°
56°
16
85°
52°
17
83°
57°
18
75°
59°
19
89°
52°
20
96°
56°
21
98°
60°
22
87°
66°
23
92°
63°
24
90°
61°
25
86°
57°
26
89°
54°
27
90°
58°
28
84°
61°
29
73°
60°
30
80°
54°
31
83°
48°
1
81°
61°
2
84°
52°
3
84°
54°
4
88°
52°
5
89°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Riverton
Riverton's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Riverton. See also: September | October | November.