S
M
T
W
T
F
S
30
78°
62°
31
81°
56°
1
78°
57°
2
77°
55°
3
76°
54°
4
76°
53°
5
77°
56°
6
77°
58°
7
78°
56°
8
77°
57°
9
76°
53°
10
77°
59°
11
80°
60°
12
80°
60°
13
82°
59°
14
81°
60°
15
82°
58°
16
80°
58°
17
79°
59°
18
81°
58°
19
79°
57°
20
77°
52°
21
80°
48°
22
74°
47°
23
72°
54°
24
77°
55°
25
71°
47°
26
Hist. Avg.
76°
52°
27
Hist. Avg.
76°
52°
28
Hist. Avg.
76°
51°
29
Hist. Avg.
75°
51°
30
Hist. Avg.
75°
50°
1
Hist. Avg.
74°
50°
2
Hist. Avg.
74°
50°
3
Hist. Avg.
74°
49°
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 71° to 82°, with overnight lows between 47° and 62°. The average high for September is 78° with an average low of 56°. 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.
