S
M
T
W
T
F
S
30
95°
69°
31
95°
69°
1
94°
68°
2
95°
69°
3
95°
69°
4
94°
70°
5
94°
68°
6
95°
65°
7
91°
60°
8
87°
60°
9
87°
66°
10
90°
66°
11
91°
64°
12
90°
64°
13
83°
66°
14
85°
67°
15
91°
57°
16
91°
57°
17
81°
56°
18
79°
57°
19
80°
55°
20
80°
54°
21
79°
56°
22
79°
54°
23
80°
55°
24
80°
56°
25
81°
62°
26
82°
62°
27
84°
63°
28
85°
62°
29
85°
54°
30
79°
54°
1
78°
55°
2
77°
52°
3
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Red Oak
Red Oak's September 2026 forecast shows daily high temperatures ranging from 76° to 95°, with overnight lows between 52° and 70°. The average high for September is 86° with an average low of 61°. 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 Red Oak. See also: October | November | December.