S
M
T
W
T
F
S
30
83°
55°
31
79°
56°
1
70°
59°
2
75°
59°
3
77°
61°
4
83°
61°
5
72°
56°
6
71°
52°
7
79°
57°
8
82°
59°
9
77°
66°
10
84°
58°
11
74°
53°
12
69°
52°
13
72°
54°
14
75°
54°
15
74°
55°
16
75°
53°
17
77°
52°
18
69°
50°
19
74°
55°
20
73°
54°
21
71°
52°
22
70°
54°
23
71°
54°
24
72°
53°
25
68°
52°
26
71°
54°
27
73°
55°
28
73°
51°
29
66°
47°
30
67°
50°
1
66°
48°
2
63°
49°
3
62°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Arlington
Arlington's September 2026 forecast shows daily high temperatures ranging from 62° to 84°, with overnight lows between 47° and 66°. The average high for September is 72° with an average low of 54°. 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 Arlington. See also: October | November | December.
