S
M
T
W
T
F
S
30
77°
53°
31
69°
50°
1
74°
47°
2
73°
51°
3
75°
54°
4
72°
48°
5
73°
52°
6
75°
51°
7
72°
53°
8
76°
54°
9
74°
50°
10
75°
49°
11
72°
48°
12
71°
49°
13
72°
48°
14
72°
47°
15
77°
41°
16
78°
49°
17
79°
48°
18
76°
47°
19
75°
46°
20
75°
43°
21
76°
46°
22
76°
46°
23
75°
45°
24
72°
45°
25
71°
44°
26
73°
44°
27
71°
43°
28
72°
43°
29
71°
42°
30
72°
43°
1
73°
42°
2
73°
42°
3
72°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Flagstaff Pulliam International Airport
Flagstaff Pulliam International Airport's September 2026 forecast shows daily high temperatures ranging from 71° to 79°, with overnight lows between 41° and 54°. The average high for September is 74° with an average low of 47°. 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 Flagstaff Pulliam International Airport. See also: October | November | December.
