S
M
T
W
T
F
S
30
89°
70°
31
90°
70°
1
91°
70°
2
91°
68°
3
91°
70°
4
90°
72°
5
86°
72°
6
93°
72°
7
N/A
8
91°
71°
9
89°
71°
10
86°
70°
11
88°
71°
12
89°
68°
13
89°
68°
14
89°
69°
15
90°
68°
16
91°
66°
17
88°
66°
18
87°
64°
19
86°
64°
20
87°
63°
21
84°
62°
22
88°
65°
23
87°
65°
24
87°
64°
25
86°
65°
26
86°
65°
27
85°
64°
28
86°
65°
29
85°
65°
30
86°
64°
1
85°
64°
2
85°
62°
3
80°
61°
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 80° to 91°, with overnight lows between 61° and 71°. The average high for September is 87° with an average low of 66°. 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.
