S
M
T
W
T
F
S
30
78°
66°
31
87°
58°
1
82°
57°
2
84°
63°
3
84°
65°
4
86°
66°
5
88°
66°
6
82°
65°
7
75°
65°
8
76°
57°
9
72°
53°
10
71°
52°
11
72°
51°
12
69°
50°
13
66°
49°
14
68°
49°
15
71°
48°
16
73°
52°
17
73°
55°
18
75°
53°
19
74°
53°
20
74°
52°
21
67°
52°
22
69°
51°
23
73°
53°
24
74°
51°
25
71°
46°
26
61°
42°
27
62°
39°
28
58°
41°
29
70°
41°
30
58°
40°
1
59°
46°
2
56°
43°
3
57°
42°
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 88°, with overnight lows between 39° and 66°. The average high for September is 71° with an average low of 52°. 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.
