S
M
T
W
T
F
S
30
75°
54°
31
73°
52°
1
72°
46°
2
68°
46°
3
71°
48°
4
73°
45°
5
71°
43°
6
61°
41°
7
60°
43°
8
59°
50°
9
58°
45°
10
59°
46°
11
60°
40°
12
58°
45°
13
59°
50°
14
59°
45°
15
58°
43°
16
57°
40°
17
58°
42°
18
60°
44°
19
66°
43°
20
66°
43°
21
64°
39°
22
56°
37°
23
55°
40°
24
56°
40°
25
55°
38°
26
55°
39°
27
56°
40°
28
55°
42°
29
54°
42°
30
53°
40°
1
54°
41°
2
58°
45°
3
60°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rockdale
Rockdale's September 2026 forecast shows daily high temperatures ranging from 53° to 75°, with overnight lows between 37° and 54°. The average high for September is 61° with an average low of 43°. 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 Rockdale. See also: October | November | December.