S
M
T
W
T
F
S
30
79°
44°
31
79°
44°
1
80°
43°
2
74°
42°
3
78°
40°
4
77°
39°
5
74°
35°
6
72°
36°
7
73°
40°
8
76°
43°
9
79°
42°
10
78°
34°
11
74°
41°
12
75°
40°
13
76°
41°
14
76°
41°
15
77°
40°
16
75°
36°
17
63°
35°
18
69°
39°
19
64°
30°
20
71°
39°
21
76°
37°
22
74°
37°
23
Hist. Avg.
75°
46°
24
Hist. Avg.
74°
46°
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 80°, with overnight lows between 30° and 44°. The average high for September is 75° with an average low of 39°. 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.
