S
M
T
W
T
F
S
30
87°
70°
31
93°
66°
1
95°
69°
2
96°
71°
3
96°
71°
4
95°
72°
5
97°
70°
6
87°
68°
7
85°
67°
8
86°
62°
9
89°
61°
10
93°
64°
11
96°
67°
12
87°
68°
13
90°
71°
14
93°
66°
15
85°
68°
16
88°
65°
17
92°
61°
18
97°
68°
19
90°
71°
20
87°
69°
21
91°
67°
22
83°
65°
23
67°
57°
24
66°
51°
25
76°
48°
26
78°
50°
27
76°
55°
28
77°
59°
29
77°
57°
30
76°
60°
1
75°
59°
2
74°
57°
3
76°
63°
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 66° to 91°, with overnight lows between 48° and 67°. The average high for September is 76° with an average low of 58°. 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.
