S
M
T
W
T
F
S
30
51°
39°
31
68°
44°
1
75°
51°
2
53°
41°
3
49°
38°
4
50°
38°
5
59°
42°
6
64°
42°
7
42°
39°
8
47°
39°
9
61°
42°
10
62°
46°
11
56°
42°
12
56°
42°
13
49°
35°
14
40°
35°
15
48°
37°
16
60°
41°
17
67°
48°
18
63°
45°
19
74°
48°
20
78°
47°
21
79°
50°
22
78°
47°
23
71°
45°
24
65°
37°
25
66°
35°
26
67°
36°
27
67°
37°
28
63°
35°
29
62°
36°
30
65°
34°
1
58°
35°
2
63°
31°
3
61°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pierce-Headquarters
Pierce-Headquarters's September 2026 forecast shows daily high temperatures ranging from 58° to 79°, with overnight lows between 31° and 50°. The average high for September is 68° 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 Pierce-Headquarters. See also: October | November | December.
