S
M
T
W
T
F
S
30
59°
54°
31
54°
48°
1
52°
48°
2
54°
50°
3
52°
48°
4
50°
48°
5
N/A
6
45°
40°
7
48°
42°
8
45°
38°
9
44°
41°
10
46°
43°
11
46°
44°
12
45°
44°
13
47°
45°
14
48°
45°
15
45°
42°
16
45°
43°
17
46°
42°
18
45°
38°
19
42°
35°
20
43°
36°
21
42°
35°
22
41°
35°
23
42°
37°
24
42°
40°
25
46°
39°
26
46°
34°
27
40°
34°
28
43°
39°
29
44°
39°
30
46°
38°
1
44°
36°
2
41°
34°
3
45°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in A
A's September 2026 forecast shows daily high temperatures ranging from 40° to 48°, with overnight lows between 34° and 45°. The average high for September is 44° with an average low of 39°. 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 A. See also: October | November | December.