S
M
T
W
T
F
S
30
74°
51°
31
71°
56°
1
72°
51°
2
73°
50°
3
66°
55°
4
71°
54°
5
72°
55°
6
73°
49°
7
71°
47°
8
64°
49°
9
70°
54°
10
68°
55°
11
71°
53°
12
70°
52°
13
64°
52°
14
64°
51°
15
63°
49°
16
64°
45°
17
63°
50°
18
64°
46°
19
62°
44°
20
61°
52°
21
66°
50°
22
67°
46°
23
65°
43°
24
59°
50°
25
60°
49°
26
65°
45°
27
Hist. Avg.
61°
46°
28
Hist. Avg.
60°
46°
29
Hist. Avg.
60°
46°
30
Hist. Avg.
59°
45°
1
Hist. Avg.
59°
45°
2
Hist. Avg.
59°
45°
3
Hist. Avg.
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Arlington
Arlington's September 2026 forecast shows daily high temperatures ranging from 59° to 74°, with overnight lows between 43° and 56°. The average high for September is 67° with an average low of 50°. 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.
