S
M
T
W
T
F
S
30
75°
54°
31
76°
53°
1
71°
65°
2
70°
64°
3
80°
56°
4
75°
52°
5
69°
47°
6
70°
47°
7
71°
51°
8
70°
53°
9
69°
59°
10
67°
52°
11
64°
49°
12
67°
52°
13
65°
53°
14
63°
52°
15
65°
49°
16
70°
52°
17
71°
47°
18
65°
45°
19
71°
48°
20
72°
51°
21
72°
50°
22
71°
50°
23
70°
48°
24
65°
44°
25
68°
49°
26
70°
49°
27
68°
48°
28
60°
45°
29
58°
42°
30
61°
42°
1
58°
38°
2
58°
40°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Adirondack
Adirondack's September 2026 forecast shows daily high temperatures ranging from 58° to 80°, with overnight lows between 38° and 59°. The average high for September is 67° 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 Adirondack. See also: October | November | December.
