S
M
T
W
T
F
S
30
74°
51°
31
72°
49°
1
72°
44°
2
71°
53°
3
62°
56°
4
67°
52°
5
67°
47°
6
70°
47°
7
71°
51°
8
69°
48°
9
67°
52°
10
70°
51°
11
67°
50°
12
68°
49°
13
65°
49°
14
65°
47°
15
66°
58°
16
69°
50°
17
69°
50°
18
70°
50°
19
70°
49°
20
69°
50°
21
70°
50°
22
70°
49°
23
68°
48°
24
62°
46°
25
65°
48°
26
68°
48°
27
66°
47°
28
60°
46°
29
61°
45°
30
62°
46°
1
57°
40°
2
55°
36°
3
56°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Acadia
Acadia's September 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 36° and 58°. The average high for September is 66° with an average low of 48°. 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 Acadia. See also: October | November | December.
