S
M
T
W
T
F
S
30
75°
52°
31
78°
51°
1
78°
47°
2
73°
61°
3
66°
60°
4
82°
61°
5
72°
54°
6
72°
52°
7
81°
48°
8
79°
54°
9
67°
46°
10
85°
65°
11
73°
48°
12
72°
41°
13
64°
57°
14
71°
46°
15
69°
41°
16
71°
50°
17
76°
53°
18
75°
51°
19
66°
43°
20
58°
40°
21
67°
45°
22
66°
44°
23
66°
37°
24
70°
37°
25
72°
55°
26
65°
53°
27
58°
53°
28
56°
54°
29
63°
53°
30
68°
52°
1
70°
56°
2
75°
53°
3
68°
51°
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 56° to 75°, with overnight lows between 51° and 56°. The average high for September is 66° with an average low of 53°. 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.
