S
M
T
W
T
F
S
30
89°
74°
31
91°
73°
1
89°
74°
2
90°
73°
3
89°
72°
4
88°
72°
5
88°
73°
6
89°
73°
7
88°
72°
8
89°
73°
9
88°
73°
10
87°
72°
11
87°
73°
12
88°
73°
13
88°
72°
14
89°
72°
15
89°
73°
16
90°
73°
17
90°
72°
18
89°
73°
19
90°
72°
20
89°
73°
21
90°
74°
22
89°
73°
23
89°
73°
24
88°
72°
25
86°
73°
26
86°
72°
27
87°
73°
28
86°
72°
29
86°
72°
30
85°
73°
1
86°
72°
2
87°
70°
3
85°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Pierce
Fort Pierce's September 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 69° and 74°. The average high for September is 88° with an average low of 73°. 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 Fort Pierce. See also: October | November | December.
