S
M
T
W
T
F
S
30
89°
72°
31
87°
73°
1
98°
77°
2
91°
74°
3
91°
71°
4
90°
72°
5
85°
73°
6
83°
63°
7
82°
62°
8
85°
67°
9
90°
73°
10
92°
66°
11
83°
58°
12
81°
63°
13
86°
67°
14
86°
60°
15
80°
60°
16
80°
59°
17
79°
62°
18
82°
59°
19
80°
57°
20
81°
61°
21
82°
63°
22
79°
62°
23
75°
62°
24
75°
61°
25
76°
60°
26
80°
60°
27
79°
59°
28
78°
60°
29
79°
60°
30
80°
59°
1
78°
59°
2
77°
58°
3
78°
57°
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 75° to 92°, with overnight lows between 57° and 73°. The average high for September is 81° with an average low of 61°. 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.
