S
M
T
W
T
F
S
30
95°
69°
31
89°
70°
1
92°
70°
2
92°
68°
3
91°
69°
4
91°
69°
5
92°
68°
6
91°
69°
7
91°
67°
8
90°
66°
9
90°
65°
10
88°
66°
11
90°
65°
12
91°
67°
13
90°
65°
14
81°
60°
15
81°
58°
16
Hist. Avg.
86°
59°
17
Hist. Avg.
85°
59°
18
Hist. Avg.
85°
58°
19
Hist. Avg.
85°
58°
20
Hist. Avg.
84°
58°
21
Hist. Avg.
84°
57°
22
Hist. Avg.
83°
57°
23
Hist. Avg.
83°
56°
24
Hist. Avg.
83°
56°
25
Hist. Avg.
82°
55°
26
Hist. Avg.
82°
55°
27
Hist. Avg.
81°
54°
28
Hist. Avg.
81°
54°
29
Hist. Avg.
81°
54°
30
Hist. Avg.
80°
53°
1
Hist. Avg.
80°
53°
2
Hist. Avg.
80°
52°
3
Hist. Avg.
79°
52°
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 81° to 95°, with overnight lows between 58° and 70°. The average high for September is 90° with an average low of 67°. 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.
