S
M
T
W
T
F
S
30
79°
67°
31
89°
69°
1
90°
69°
2
86°
69°
3
88°
72°
4
92°
71°
5
87°
71°
6
75°
69°
7
81°
67°
8
77°
67°
9
85°
60°
10
82°
54°
11
83°
55°
12
76°
55°
13
67°
50°
14
70°
54°
15
71°
56°
16
73°
54°
17
75°
65°
18
73°
63°
19
73°
58°
20
68°
54°
21
63°
48°
22
62°
45°
23
65°
50°
24
65°
53°
25
66°
52°
26
70°
55°
27
67°
52°
28
68°
54°
29
66°
50°
30
70°
50°
1
70°
53°
2
69°
44°
3
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alden
Alden's September 2026 forecast shows daily high temperatures ranging from 62° to 73°, with overnight lows between 44° and 58°. The average high for September is 67° 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 Alden. See also: October | November | December.