S
M
T
W
T
F
S
30
76°
47°
31
85°
53°
1
69°
57°
2
63°
56°
3
60°
52°
4
68°
49°
5
70°
51°
6
76°
51°
7
73°
48°
8
78°
53°
9
80°
55°
10
79°
54°
11
72°
50°
12
75°
52°
13
74°
51°
14
79°
52°
15
77°
54°
16
78°
49°
17
72°
47°
18
71°
49°
19
71°
45°
20
73°
51°
21
72°
45°
22
73°
50°
23
70°
44°
24
69°
44°
25
69°
45°
26
76°
46°
27
78°
47°
28
78°
49°
29
77°
51°
30
76°
51°
1
77°
50°
2
78°
51°
3
76°
50°
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 60° to 80°, with overnight lows between 44° and 55°. The average high for September is 74° with an average low of 50°. 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.
