S
M
T
W
T
F
S
30
85°
60°
31
86°
67°
1
85°
71°
2
91°
72°
3
91°
69°
4
81°
68°
5
76°
64°
6
77°
57°
7
79°
55°
8
82°
57°
9
85°
68°
10
79°
69°
11
80°
65°
12
83°
63°
13
83°
66°
14
70°
47°
15
82°
62°
16
85°
66°
17
83°
65°
18
76°
57°
19
76°
60°
20
72°
53°
21
71°
52°
22
70°
49°
23
70°
49°
24
72°
51°
25
73°
50°
26
71°
51°
27
76°
52°
28
76°
51°
29
75°
51°
30
75°
50°
1
74°
52°
2
75°
49°
3
73°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dallas
Dallas's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 46° and 66°. The average high for September is 75° with an average low of 53°. 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 Dallas. See also: October | November | December.
