S
M
T
W
T
F
S
26
88°
63°
27
90°
56°
28
84°
55°
29
86°
51°
30
91°
56°
31
94°
54°
1
96°
51°
2
94°
52°
3
95°
51°
4
94°
49°
5
93°
48°
6
94°
51°
7
92°
52°
8
93°
49°
9
92°
56°
10
88°
57°
11
87°
54°
12
74°
54°
13
73°
56°
14
65°
50°
15
80°
44°
16
83°
47°
17
88°
49°
18
89°
50°
19
90°
50°
20
87°
52°
21
88°
55°
22
89°
50°
23
86°
51°
24
81°
53°
25
86°
47°
26
92°
49°
27
88°
59°
28
86°
58°
29
77°
54°
30
75°
51°
31
72°
49°
1
75°
52°
2
77°
50°
3
77°
51°
4
80°
50°
5
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grand Canyon
Grand Canyon's August 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 49° and 59°. The average high for August is 78° with an average low of 53°. 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 Grand Canyon. See also: September | October | November.
