S
M
T
W
T
F
S
30
78°
66°
31
78°
71°
1
80°
68°
2
73°
66°
3
86°
69°
4
86°
76°
5
81°
69°
6
74°
63°
7
80°
60°
8
82°
65°
9
80°
66°
10
88°
72°
11
79°
67°
12
77°
62°
13
80°
71°
14
77°
62°
15
71°
62°
16
76°
69°
17
80°
70°
18
80°
61°
19
71°
63°
20
71°
62°
21
72°
62°
22
69°
56°
23
70°
57°
24
70°
56°
25
71°
57°
26
73°
57°
27
71°
56°
28
70°
55°
29
75°
57°
30
69°
53°
1
67°
54°
2
69°
58°
3
73°
54°
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 67° to 80°, with overnight lows between 53° and 70°. The average high for September is 72° with an average low of 59°. 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.
