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
65°
40°
9
73°
45°
10
77°
48°
11
63°
43°
12
64°
40°
13
53°
34°
14
67°
36°
15
72°
37°
16
70°
39°
17
73°
41°
18
74°
40°
19
77°
41°
20
76°
41°
21
71°
35°
22
67°
39°
23
68°
38°
24
73°
40°
25
74°
41°
26
73°
40°
27
62°
38°
28
61°
32°
29
58°
27°
30
58°
28°
1
62°
32°
2
66°
34°
3
69°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pierce
Pierce's September 2026 forecast shows daily high temperatures ranging from 53° to 77°, with overnight lows between 27° and 48°. The average high for September is 68° with an average low of 38°. 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. See also: October | November | December.
