S
M
T
W
T
F
S
30
81°
56°
31
77°
49°
1
80°
47°
2
78°
47°
3
65°
59°
4
80°
60°
5
72°
53°
6
69°
50°
7
79°
49°
8
74°
46°
9
64°
40°
10
82°
61°
11
71°
50°
12
74°
41°
13
63°
51°
14
69°
48°
15
70°
39°
16
73°
53°
17
70°
50°
18
75°
50°
19
66°
39°
20
60°
44°
21
69°
45°
22
65°
41°
23
66°
37°
24
72°
42°
25
73°
51°
26
64°
54°
27
64°
51°
28
59°
52°
29
61°
50°
30
68°
51°
1
72°
52°
2
67°
50°
3
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Winterport
Winterport's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 42° and 54°. The average high for September is 67° with an average low of 50°. 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 Winterport. See also: October | November | December.
