S
M
T
W
T
F
S
30
101°
77°
31
106°
77°
1
107°
76°
2
104°
76°
3
100°
75°
4
99°
72°
5
99°
74°
6
102°
74°
7
100°
75°
8
102°
74°
9
99°
74°
10
98°
70°
11
98°
72°
12
99°
73°
13
102°
72°
14
96°
65°
15
95°
64°
16
96°
65°
17
97°
68°
18
99°
69°
19
101°
68°
20
102°
69°
21
100°
68°
22
100°
66°
23
98°
64°
24
99°
66°
25
99°
67°
26
98°
66°
27
101°
65°
28
101°
66°
29
98°
65°
30
95°
61°
1
93°
58°
2
91°
58°
3
92°
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 91° to 107°, with overnight lows between 57° and 77°. The average high for September is 99° with an average low of 69°. 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.
