S
M
T
W
T
F
S
30
89°
67°
31
89°
65°
1
88°
63°
2
82°
60°
3
83°
61°
4
85°
63°
5
87°
64°
6
83°
61°
7
81°
60°
8
82°
62°
9
83°
60°
10
81°
59°
11
81°
60°
12
83°
61°
13
84°
59°
14
80°
58°
15
81°
59°
16
80°
59°
17
83°
58°
18
81°
57°
19
82°
56°
20
Hist. Avg.
81°
58°
21
Hist. Avg.
81°
58°
22
Hist. Avg.
81°
57°
23
Hist. Avg.
80°
57°
24
Hist. Avg.
80°
57°
25
Hist. Avg.
80°
56°
26
Hist. Avg.
79°
56°
27
Hist. Avg.
79°
56°
28
Hist. Avg.
79°
55°
29
Hist. Avg.
79°
55°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
78°
54°
2
Hist. Avg.
78°
54°
3
Hist. Avg.
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Red Oak
Red Oak's September 2026 forecast shows daily high temperatures ranging from 80° to 89°, with overnight lows between 56° and 67°. The average high for September is 83° 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.