S
M
T
W
T
F
S
30
94°
74°
31
95°
76°
1
90°
77°
2
95°
77°
3
92°
77°
4
93°
77°
5
95°
77°
6
93°
76°
7
87°
75°
8
91°
77°
9
92°
77°
10
94°
75°
11
93°
75°
12
96°
75°
13
90°
75°
14
94°
76°
15
90°
75°
16
89°
74°
17
90°
73°
18
89°
74°
19
90°
72°
20
89°
73°
21
90°
72°
22
89°
72°
23
88°
73°
24
87°
73°
25
89°
72°
26
88°
71°
27
86°
73°
28
87°
73°
29
86°
72°
30
87°
73°
1
87°
73°
2
88°
71°
3
86°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Haines City
Haines City's September 2026 forecast shows daily high temperatures ranging from 86° to 94°, with overnight lows between 71° and 76°. The average high for September is 89° 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 Haines City. See also: October | November | December.