S
M
T
W
T
F
S
30
93°
74°
31
92°
75°
1
91°
75°
2
95°
77°
3
97°
78°
4
94°
76°
5
93°
74°
6
91°
75°
7
93°
76°
8
90°
78°
9
90°
77°
10
88°
75°
11
91°
75°
12
92°
80°
13
91°
79°
14
90°
78°
15
92°
76°
16
92°
78°
17
91°
76°
18
92°
74°
19
88°
72°
20
89°
70°
21
88°
72°
22
87°
71°
23
89°
73°
24
88°
72°
25
88°
75°
26
87°
74°
27
83°
75°
28
86°
75°
29
87°
74°
30
88°
75°
1
88°
74°
2
86°
74°
3
85°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Freeport
Freeport's September 2026 forecast shows daily high temperatures ranging from 83° to 92°, with overnight lows between 70° and 80°. The average high for September is 89° with an average low of 75°. 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 Freeport. See also: October | November | December.
