S
M
T
W
T
F
S
30
74°
54°
31
77°
58°
1
72°
56°
2
78°
59°
3
76°
51°
4
72°
49°
5
70°
50°
6
70°
52°
7
71°
50°
8
76°
50°
9
75°
49°
10
79°
47°
11
72°
47°
12
71°
48°
13
74°
49°
14
77°
50°
15
78°
55°
16
78°
54°
17
79°
55°
18
78°
51°
19
66°
44°
20
67°
43°
21
66°
43°
22
Hist. Avg.
70°
46°
23
Hist. Avg.
69°
45°
24
Hist. Avg.
69°
45°
25
Hist. Avg.
69°
44°
26
Hist. Avg.
68°
44°
27
Hist. Avg.
68°
43°
28
Hist. Avg.
67°
43°
29
Hist. Avg.
67°
42°
30
Hist. Avg.
66°
42°
1
Hist. Avg.
66°
41°
2
Hist. Avg.
65°
41°
3
Hist. Avg.
65°
40°
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 66° to 79°, with overnight lows between 43° and 59°. The average high for September is 74° with an average low of 51°. 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.
