S
M
T
W
T
F
S
30
83°
45°
31
82°
44°
1
81°
43°
2
80°
43°
3
81°
42°
4
80°
43°
5
77°
41°
6
79°
41°
7
81°
42°
8
79°
41°
9
76°
37°
10
67°
32°
11
67°
36°
12
68°
31°
13
66°
31°
14
63°
30°
15
64°
30°
16
65°
33°
17
66°
32°
18
68°
34°
19
65°
31°
20
64°
34°
21
66°
33°
22
64°
31°
23
67°
35°
24
72°
35°
25
Hist. Avg.
74°
46°
26
Hist. Avg.
73°
45°
27
Hist. Avg.
73°
45°
28
Hist. Avg.
72°
45°
29
Hist. Avg.
72°
44°
30
Hist. Avg.
71°
44°
1
Hist. Avg.
70°
44°
2
Hist. Avg.
70°
44°
3
Hist. Avg.
69°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Headquarters
Headquarters's September 2026 forecast shows daily high temperatures ranging from 63° to 83°, with overnight lows between 30° and 45°. The average high for September is 72° with an average low of 37°. 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.
