S
M
T
W
T
F
S
30
107°
76°
31
90°
81°
1
102°
78°
2
100°
81°
3
102°
81°
4
102°
81°
5
100°
81°
6
104°
77°
7
106°
75°
8
108°
79°
9
106°
88°
10
108°
86°
11
104°
86°
12
102°
82°
13
102°
84°
14
104°
82°
15
99°
82°
16
97°
75°
17
93°
73°
18
100°
73°
19
100°
70°
20
100°
70°
21
100°
77°
22
99°
78°
23
101°
75°
24
99°
73°
25
101°
72°
26
104°
73°
27
100°
73°
28
95°
67°
29
101°
72°
30
100°
74°
1
101°
73°
2
96°
61°
3
99°
65°
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 95° to 104°, with overnight lows between 61° and 78°. The average high for September is 100° with an average low of 71°. 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.
