S
M
T
W
T
F
S
30
79°
54°
31
75°
52°
1
73°
48°
2
69°
48°
3
64°
58°
4
77°
61°
5
69°
53°
6
66°
51°
7
77°
45°
8
74°
46°
9
64°
42°
10
N/A
11
69°
47°
12
67°
56°
13
64°
60°
14
72°
47°
15
70°
55°
16
74°
56°
17
70°
57°
18
71°
50°
19
69°
48°
20
65°
48°
21
67°
49°
22
67°
48°
23
66°
49°
24
68°
48°
25
62°
45°
26
62°
44°
27
61°
50°
28
61°
49°
29
62°
49°
30
61°
48°
1
61°
51°
2
64°
51°
3
67°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Acadia National Park
Acadia National Park's September 2026 forecast shows daily high temperatures ranging from 61° to 74°, with overnight lows between 44° and 60°. The average high for September is 66° 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 Acadia National Park. See also: October | November | December.
