S
M
T
W
T
F
S
30
79°
54°
31
80°
53°
1
79°
51°
2
76°
59°
3
67°
63°
4
85°
62°
5
75°
56°
6
74°
51°
7
81°
57°
8
78°
50°
9
68°
63°
10
83°
58°
11
75°
46°
12
74°
56°
13
75°
59°
14
75°
57°
15
71°
56°
16
73°
53°
17
72°
51°
18
69°
51°
19
71°
52°
20
68°
39°
21
63°
52°
22
64°
51°
23
65°
51°
24
69°
50°
25
66°
51°
26
67°
49°
27
63°
45°
28
63°
46°
29
69°
49°
30
70°
50°
1
69°
50°
2
68°
49°
3
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wiscasset
Wiscasset's September 2026 forecast shows daily high temperatures ranging from 63° to 83°, with overnight lows between 39° and 63°. The average high for September is 70° with an average low of 51°. 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 Wiscasset. See also: October | November | December.
