S
M
T
W
T
F
S
26
79°
54°
27
80°
52°
28
83°
55°
29
85°
55°
30
83°
54°
31
82°
55°
1
82°
55°
2
83°
54°
3
79°
55°
4
79°
51°
5
80°
52°
6
81°
53°
7
86°
53°
8
84°
53°
9
85°
52°
10
84°
53°
11
85°
51°
12
83°
53°
13
80°
53°
14
79°
49°
15
82°
50°
16
84°
51°
17
83°
52°
18
86°
52°
19
84°
54°
20
84°
52°
21
83°
52°
22
84°
51°
23
83°
52°
24
81°
48°
25
82°
47°
26
83°
49°
27
84°
50°
28
84°
47°
29
85°
49°
30
84°
50°
31
84°
49°
1
83°
48°
2
84°
51°
3
84°
46°
4
77°
47°
5
76°
50°
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 76° to 86°, with overnight lows between 46° and 55°. The average high for August is 83° with an average low of 51°. 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.
