S
M
T
W
T
F
S
30
78°
62°
31
83°
64°
1
74°
59°
2
75°
58°
3
73°
56°
4
77°
57°
5
76°
55°
6
70°
52°
7
76°
57°
8
75°
55°
9
74°
58°
10
75°
57°
11
71°
54°
12
73°
56°
13
76°
54°
14
71°
50°
15
71°
51°
16
74°
55°
17
72°
56°
18
76°
51°
19
72°
48°
20
67°
47°
21
70°
53°
22
75°
54°
23
75°
52°
24
71°
47°
25
66°
49°
26
65°
46°
27
64°
44°
28
64°
45°
29
65°
44°
30
65°
45°
1
66°
47°
2
65°
43°
3
61°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Arlington
Mount Arlington's September 2026 forecast shows daily high temperatures ranging from 61° to 83°, with overnight lows between 43° and 64°. The average high for September is 71° with an average low of 52°. 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 Mount Arlington. See also: October | November | December.
