S
M
T
W
T
F
S
30
81°
54°
31
70°
50°
1
74°
44°
2
78°
48°
3
77°
41°
4
79°
45°
5
80°
42°
6
75°
56°
7
79°
50°
8
83°
47°
9
87°
46°
10
86°
45°
11
85°
52°
12
85°
50°
13
79°
53°
14
80°
54°
15
78°
55°
16
72°
54°
17
74°
49°
18
76°
44°
19
75°
39°
20
75°
49°
21
75°
48°
22
71°
49°
23
70°
47°
24
70°
46°
25
72°
48°
26
71°
45°
27
72°
46°
28
71°
40°
29
70°
44°
30
72°
44°
1
74°
45°
2
74°
44°
3
68°
43°
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 68° to 78°, with overnight lows between 39° and 55°. The average high for September is 73° with an average low of 46°. 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.
