S
M
T
W
T
F
S
30
85°
68°
31
N/A
1
86°
64°
2
83°
68°
3
86°
68°
4
87°
69°
5
86°
67°
6
85°
63°
7
79°
64°
8
78°
62°
9
79°
57°
10
77°
52°
11
73°
53°
12
75°
53°
13
73°
54°
14
74°
51°
15
79°
57°
16
77°
55°
17
77°
57°
18
79°
57°
19
77°
55°
20
76°
56°
21
78°
57°
22
78°
57°
23
77°
56°
24
78°
56°
25
77°
55°
26
76°
55°
27
77°
54°
28
77°
54°
29
76°
53°
30
76°
55°
1
75°
55°
2
76°
54°
3
75°
52°
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 73° to 87°, with overnight lows between 51° and 69°. The average high for September is 78° with an average low of 57°. 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.