S
M
T
W
T
F
S
30
100°
79°
31
100°
77°
1
98°
76°
2
95°
75°
3
88°
74°
4
97°
75°
5
98°
75°
6
99°
76°
7
99°
77°
8
101°
78°
9
99°
77°
10
95°
74°
11
94°
73°
12
93°
71°
13
91°
72°
14
88°
67°
15
91°
72°
16
90°
71°
17
91°
71°
18
91°
70°
19
90°
71°
20
90°
71°
21
89°
70°
22
87°
70°
23
88°
69°
24
89°
69°
25
89°
68°
26
88°
67°
27
89°
68°
28
89°
67°
29
88°
66°
30
89°
68°
1
88°
67°
2
87°
67°
3
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rockwall
Rockwall's September 2026 forecast shows daily high temperatures ranging from 87° to 101°, with overnight lows between 66° and 78°. The average high for September is 92° with an average low of 71°. 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 Rockwall. See also: October | November | December.
