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
N/A
18
87°
57°
19
89°
57°
20
86°
58°
21
83°
54°
22
81°
53°
23
83°
52°
24
81°
51°
25
83°
52°
26
82°
51°
27
82°
51°
28
83°
52°
29
81°
51°
30
80°
51°
31
79°
48°
1
79°
51°
2
78°
52°
3
79°
52°
4
81°
51°
5
80°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Grand Canyon
Grand Canyon's August 2026 forecast shows daily high temperatures ranging from 78° to 89°, 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 Grand Canyon. See also: September | October | November.
