S
M
T
W
T
F
S
30
78°
44°
31
78°
44°
1
79°
46°
2
80°
47°
3
78°
43°
4
75°
43°
5
77°
45°
6
Hist. Avg.
80°
44°
7
Hist. Avg.
80°
43°
8
Hist. Avg.
80°
43°
9
Hist. Avg.
79°
43°
10
Hist. Avg.
79°
42°
11
Hist. Avg.
79°
42°
12
Hist. Avg.
78°
42°
13
Hist. Avg.
78°
41°
14
Hist. Avg.
78°
41°
15
Hist. Avg.
77°
41°
16
Hist. Avg.
77°
40°
17
Hist. Avg.
77°
40°
18
Hist. Avg.
76°
40°
19
Hist. Avg.
76°
39°
20
Hist. Avg.
76°
39°
21
Hist. Avg.
75°
39°
22
Hist. Avg.
75°
38°
23
Hist. Avg.
74°
38°
24
Hist. Avg.
74°
38°
25
Hist. Avg.
74°
37°
26
Hist. Avg.
73°
37°
27
Hist. Avg.
73°
36°
28
Hist. Avg.
72°
36°
29
Hist. Avg.
72°
36°
30
Hist. Avg.
72°
35°
1
Hist. Avg.
71°
35°
2
Hist. Avg.
71°
35°
3
Hist. Avg.
70°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Grand Canyon
Grand Canyon's September 2026 forecast shows daily high temperatures ranging from 75° to 80°, with overnight lows between 43° and 47°. The average high for September is 78° with an average low of 45°. 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.
