S
M
T
W
T
F
S
30
53°
38°
31
40°
34°
1
53°
37°
2
53°
34°
3
60°
45°
4
53°
49°
5
55°
44°
6
57°
45°
7
53°
48°
8
54°
42°
9
56°
40°
10
55°
39°
11
51°
40°
12
52°
38°
13
51°
40°
14
51°
36°
15
53°
35°
16
52°
34°
17
46°
36°
18
47°
39°
19
47°
39°
20
48°
37°
21
47°
33°
22
46°
29°
23
45°
28°
24
46°
30°
25
46°
32°
26
43°
37°
27
46°
36°
28
49°
35°
29
48°
33°
30
47°
36°
1
46°
37°
2
47°
35°
3
46°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Matanuska-Susitna Census Subarea
Matanuska-Susitna Census Subarea's September 2026 forecast shows daily high temperatures ranging from 43° to 60°, with overnight lows between 28° and 49°. The average high for September is 50° with an average low of 37°. 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 Matanuska-Susitna Census Subarea. See also: October | November | December.
