S
M
T
W
T
F
S
30
84°
46°
31
89°
43°
1
79°
50°
2
72°
55°
3
70°
51°
4
70°
50°
5
83°
49°
6
69°
49°
7
56°
48°
8
76°
49°
9
83°
44°
10
90°
47°
11
77°
50°
12
74°
46°
13
57°
45°
14
63°
39°
15
63°
43°
16
72°
43°
17
71°
39°
18
73°
39°
19
71°
38°
20
72°
39°
21
69°
39°
22
71°
38°
23
70°
39°
24
72°
40°
25
66°
33°
26
58°
38°
27
62°
30°
28
57°
27°
29
58°
31°
30
57°
30°
1
56°
26°
2
60°
29°
3
54°
25°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Headquarters
Headquarters's September 2026 forecast shows daily high temperatures ranging from 54° to 74°, with overnight lows between 25° and 46°. The average high for September is 65° with an average low of 36°. 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 Headquarters. See also: October | November | December.
