S
M
T
W
T
F
S
30
86°
75°
31
88°
75°
1
89°
75°
2
89°
77°
3
88°
76°
4
89°
77°
5
88°
73°
6
90°
74°
7
88°
73°
8
89°
74°
9
89°
72°
10
88°
75°
11
90°
75°
12
85°
75°
13
85°
74°
14
87°
76°
15
87°
75°
16
88°
75°
17
86°
74°
18
86°
75°
19
87°
75°
20
86°
74°
21
85°
75°
22
85°
74°
23
84°
74°
24
84°
74°
25
85°
74°
26
85°
74°
27
86°
75°
28
85°
74°
29
86°
74°
30
87°
74°
1
86°
73°
2
84°
74°
3
84°
74°
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 84° to 90°, with overnight lows between 72° and 77°. The average high for September is 87° with an average low of 74°. 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.
