S
M
T
W
T
F
S
30
82°
68°
31
82°
68°
1
81°
63°
2
75°
60°
3
74°
60°
4
74°
61°
5
75°
59°
6
79°
64°
7
81°
66°
8
80°
66°
9
77°
65°
10
80°
66°
11
81°
65°
12
80°
66°
13
81°
67°
14
80°
57°
15
73°
57°
16
70°
56°
17
71°
57°
18
71°
55°
19
72°
56°
20
71°
56°
21
77°
57°
22
76°
61°
23
77°
53°
24
76°
53°
25
71°
52°
26
69°
54°
27
72°
59°
28
73°
59°
29
74°
51°
30
70°
52°
1
66°
56°
2
67°
57°
3
71°
57°
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 66° to 82°, with overnight lows between 51° and 68°. The average high for September is 75° 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.
