S
M
T
W
T
F
S
30
91°
72°
31
91°
73°
1
90°
72°
2
89°
73°
3
92°
72°
4
92°
75°
5
91°
75°
6
92°
74°
7
91°
73°
8
90°
74°
9
91°
73°
10
90°
74°
11
89°
73°
12
87°
73°
13
88°
72°
14
88°
73°
15
87°
73°
16
87°
72°
17
89°
72°
18
90°
71°
19
88°
72°
20
89°
71°
21
89°
71°
22
88°
70°
23
89°
71°
24
89°
70°
25
88°
69°
26
88°
68°
27
89°
69°
28
87°
69°
29
88°
68°
30
87°
68°
1
86°
66°
2
87°
68°
3
86°
65°
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 86° to 92°, with overnight lows between 65° and 75°. The average high for September is 89° with an average low of 71°. 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.
