S
M
T
W
T
F
S
30
88°
66°
31
85°
62°
1
83°
58°
2
86°
64°
3
88°
69°
4
84°
66°
5
85°
64°
6
78°
66°
7
77°
66°
8
84°
60°
9
74°
52°
10
78°
58°
11
80°
58°
12
79°
51°
13
70°
52°
14
69°
51°
15
70°
53°
16
73°
56°
17
72°
53°
18
71°
52°
19
70°
48°
20
74°
53°
21
67°
53°
22
72°
52°
23
72°
53°
24
74°
52°
25
68°
51°
26
70°
52°
27
72°
53°
28
71°
52°
29
69°
51°
30
66°
49°
1
59°
44°
2
57°
39°
3
57°
38°
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 57° to 84°, with overnight lows between 38° and 66°. The average high for September is 71° with an average low of 52°. 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.
