S
M
T
W
T
F
S
30
93°
73°
31
93°
73°
1
91°
77°
2
95°
77°
3
91°
75°
4
93°
73°
5
95°
75°
6
95°
73°
7
88°
75°
8
91°
77°
9
93°
75°
10
95°
75°
11
95°
72°
12
93°
75°
13
91°
73°
14
95°
73°
15
93°
76°
16
91°
72°
17
90°
72°
18
89°
71°
19
88°
72°
20
88°
71°
21
89°
72°
22
88°
71°
23
91°
71°
24
89°
72°
25
88°
72°
26
87°
71°
27
89°
72°
28
88°
70°
29
85°
73°
30
85°
72°
1
86°
72°
2
86°
71°
3
85°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bartow
Bartow's September 2026 forecast shows daily high temperatures ranging from 85° to 93°, with overnight lows between 70° and 76°. The average high for September is 88° with an average low of 72°. 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 Bartow. See also: October | November | December.