S
M
T
W
T
F
S
26
99°
60°
27
82°
59°
28
97°
52°
29
93°
53°
30
93°
51°
31
97°
54°
1
101°
51°
2
90°
61°
3
81°
51°
4
83°
39°
5
87°
41°
6
96°
43°
7
96°
51°
8
97°
51°
9
94°
53°
10
95°
57°
11
94°
52°
12
88°
58°
13
73°
55°
14
76°
52°
15
77°
50°
16
87°
52°
17
87°
56°
18
83°
50°
19
85°
54°
20
84°
52°
21
86°
53°
22
88°
56°
23
92°
55°
24
90°
54°
25
93°
52°
26
86°
52°
27
83°
52°
28
83°
51°
29
83°
50°
30
78°
51°
31
77°
51°
1
74°
50°
2
74°
49°
3
75°
48°
4
75°
49°
5
76°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Idaho Falls
Idaho Falls's August 2026 forecast shows daily high temperatures ranging from 73° to 93°, with overnight lows between 48° and 58°. The average high for August is 82° with an average low of 52°. 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 Idaho Falls. See also: September | October | November.
