S
M
T
W
T
F
S
30
78°
65°
31
81°
67°
1
83°
61°
2
78°
60°
3
77°
60°
4
77°
59°
5
78°
59°
6
78°
62°
7
80°
59°
8
79°
64°
9
81°
64°
10
81°
63°
11
80°
62°
12
81°
64°
13
81°
64°
14
80°
63°
15
81°
63°
16
81°
61°
17
78°
62°
18
78°
63°
19
77°
62°
20
79°
62°
21
78°
60°
22
77°
53°
23
72°
59°
24
70°
59°
25
Hist. Avg.
77°
61°
26
Hist. Avg.
77°
61°
27
Hist. Avg.
76°
60°
28
Hist. Avg.
76°
60°
29
Hist. Avg.
76°
60°
30
Hist. Avg.
75°
59°
1
Hist. Avg.
75°
59°
2
Hist. Avg.
74°
58°
3
Hist. Avg.
74°
58°
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 70° to 83°, with overnight lows between 53° and 67°. The average high for September is 79° with an average low of 62°. 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.
