S
M
T
W
T
F
S
30
90°
70°
31
91°
69°
1
94°
68°
2
96°
69°
3
96°
73°
4
94°
72°
5
99°
71°
6
N/A
7
86°
69°
8
85°
70°
9
85°
69°
10
86°
68°
11
88°
67°
12
88°
67°
13
90°
69°
14
89°
68°
15
88°
67°
16
87°
65°
17
86°
64°
18
87°
65°
19
86°
59°
20
80°
63°
21
86°
64°
22
85°
63°
23
85°
63°
24
84°
62°
25
85°
62°
26
85°
61°
27
84°
63°
28
85°
63°
29
83°
62°
30
83°
61°
1
82°
61°
2
82°
57°
3
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Dallas
Dallas's September 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 54° and 70°. The average high for September is 85° with an average low of 64°. 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.
