S
M
T
W
T
F
S
30
93°
64°
31
95°
72°
1
97°
71°
2
98°
72°
3
98°
73°
4
100°
74°
5
101°
73°
6
94°
74°
7
90°
64°
8
96°
63°
9
96°
76°
10
90°
76°
11
85°
71°
12
87°
66°
13
94°
69°
14
94°
71°
15
97°
72°
16
92°
70°
17
89°
65°
18
85°
60°
19
80°
57°
20
78°
56°
21
79°
55°
22
82°
56°
23
83°
56°
24
80°
55°
25
85°
61°
26
84°
60°
27
84°
60°
28
83°
59°
29
84°
60°
30
83°
59°
1
82°
58°
2
81°
58°
3
82°
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 78° to 97°, with overnight lows between 55° and 72°. The average high for September is 85° 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.
