S
M
T
W
T
F
S
30
89°
75°
31
90°
76°
1
89°
76°
2
89°
75°
3
90°
76°
4
90°
75°
5
91°
75°
6
89°
76°
7
90°
74°
8
89°
74°
9
91°
75°
10
89°
73°
11
88°
74°
12
88°
74°
13
89°
75°
14
91°
74°
15
89°
75°
16
89°
74°
17
90°
74°
18
90°
75°
19
89°
74°
20
88°
75°
21
90°
74°
22
90°
75°
23
91°
75°
24
89°
74°
25
89°
76°
26
88°
75°
27
89°
75°
28
88°
74°
29
90°
75°
30
88°
75°
1
87°
74°
2
88°
71°
3
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Palmetto
Palmetto's September 2026 forecast shows daily high temperatures ranging from 86° to 91°, with overnight lows between 69° and 76°. The average high for September is 89° 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 Palmetto. See also: October | November | December.