S
M
T
W
T
F
S
30
81°
54°
31
70°
50°
1
75°
53°
2
76°
51°
3
79°
51°
4
79°
48°
5
72°
53°
6
73°
52°
7
75°
53°
8
75°
52°
9
77°
53°
10
77°
51°
11
80°
50°
12
79°
51°
13
76°
52°
14
77°
44°
15
80°
50°
16
81°
51°
17
80°
50°
18
80°
49°
19
79°
49°
20
79°
48°
21
78°
48°
22
79°
47°
23
78°
48°
24
78°
48°
25
75°
47°
26
72°
47°
27
69°
45°
28
72°
45°
29
74°
44°
30
72°
44°
1
70°
43°
2
72°
44°
3
73°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grand Canyon
Grand Canyon's September 2026 forecast shows daily high temperatures ranging from 69° to 81°, with overnight lows between 43° and 53°. The average high for September is 76° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Grand Canyon. See also: October | November | December.
