S
M
T
W
T
F
S
30
92°
69°
31
88°
68°
1
91°
68°
2
95°
68°
3
94°
75°
4
96°
67°
5
92°
69°
6
85°
68°
7
91°
67°
8
80°
67°
9
82°
58°
10
85°
51°
11
88°
65°
12
74°
53°
13
60°
57°
14
82°
58°
15
72°
54°
16
65°
59°
17
75°
64°
18
82°
65°
19
77°
56°
20
69°
52°
21
70°
51°
22
71°
53°
23
72°
54°
24
72°
53°
25
75°
54°
26
76°
52°
27
78°
54°
28
70°
53°
29
71°
50°
30
66°
47°
1
73°
50°
2
69°
51°
3
74°
47°
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 65° to 82°, with overnight lows between 47° and 65°. The average high for September is 73° with an average low of 54°. 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.
