S
M
T
W
T
F
S
30
86°
79°
31
88°
79°
1
89°
78°
2
89°
79°
3
90°
79°
4
88°
78°
5
88°
77°
6
89°
78°
7
92°
77°
8
90°
77°
9
90°
75°
10
91°
76°
11
92°
77°
12
91°
75°
13
91°
76°
14
92°
76°
15
92°
75°
16
90°
74°
17
87°
74°
18
88°
73°
19
87°
74°
20
88°
74°
21
90°
73°
22
90°
71°
23
90°
72°
24
88°
72°
25
89°
71°
26
88°
73°
27
89°
73°
28
89°
71°
29
85°
69°
30
84°
68°
1
83°
67°
2
84°
68°
3
84°
67°
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 67° and 79°. 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 Freeport. See also: October | November | December.
