S
M
T
W
T
F
S
26
93°
63°
27
92°
63°
28
90°
62°
29
89°
62°
30
92°
63°
31
86°
62°
1
86°
62°
2
88°
61°
3
87°
62°
4
90°
62°
5
86°
61°
6
86°
62°
7
93°
55°
8
85°
56°
9
86°
56°
10
87°
57°
11
91°
60°
12
90°
58°
13
87°
55°
14
86°
52°
15
84°
55°
16
85°
55°
17
90°
57°
18
91°
59°
19
92°
60°
20
92°
55°
21
91°
57°
22
89°
58°
23
89°
57°
24
85°
48°
25
81°
48°
26
80°
49°
27
82°
52°
28
86°
50°
29
87°
55°
30
89°
54°
31
88°
55°
1
89°
57°
2
89°
55°
3
88°
50°
4
86°
49°
5
83°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in American Falls
American Falls's August 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 48° and 63°. The average high for August is 88° 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 American Falls. See also: September | October | November.
