S
M
T
W
T
F
S
30
89°
76°
31
88°
72°
1
93°
74°
2
96°
72°
3
94°
75°
4
94°
76°
5
92°
75°
6
89°
73°
7
91°
74°
8
94°
69°
9
84°
56°
10
83°
63°
11
86°
61°
12
86°
63°
13
80°
59°
14
75°
55°
15
74°
57°
16
75°
57°
17
80°
59°
18
77°
59°
19
71°
56°
20
77°
54°
21
82°
61°
22
81°
60°
23
81°
61°
24
80°
61°
25
73°
60°
26
73°
60°
27
79°
59°
28
77°
60°
29
74°
59°
30
76°
52°
1
66°
48°
2
65°
45°
3
64°
43°
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 64° to 94°, with overnight lows between 43° and 74°. The average high for September is 78° with an average low of 58°. 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.
