S
M
T
W
T
F
S
30
75°
62°
31
84°
61°
1
85°
61°
2
84°
60°
3
84°
62°
4
85°
62°
5
85°
61°
6
84°
61°
7
84°
60°
8
85°
61°
9
84°
60°
10
85°
61°
11
78°
57°
12
85°
47°
13
79°
53°
14
82°
55°
15
83°
46°
16
73°
43°
17
69°
46°
18
71°
47°
19
76°
52°
20
69°
54°
21
73°
53°
22
79°
48°
23
78°
48°
24
77°
45°
25
77°
42°
26
76°
47°
27
78°
39°
28
65°
50°
29
74°
50°
30
76°
49°
1
78°
36°
2
76°
33°
3
60°
36°
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 60° to 85°, with overnight lows between 33° and 62°. The average high for September is 78° with an average low of 52°. 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.
