S
M
T
W
T
F
S
30
95°
73°
31
95°
74°
1
94°
73°
2
93°
73°
3
93°
72°
4
92°
72°
5
93°
71°
6
92°
72°
7
92°
71°
8
91°
71°
9
92°
70°
10
92°
71°
11
91°
72°
12
92°
72°
13
92°
71°
14
86°
67°
15
81°
69°
16
91°
68°
17
90°
64°
18
90°
57°
19
78°
55°
20
81°
57°
21
82°
62°
22
86°
64°
23
86°
63°
24
85°
64°
25
85°
63°
26
84°
63°
27
85°
53°
28
81°
51°
29
76°
54°
30
80°
60°
1
83°
61°
2
84°
61°
3
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oklahoma City Northwest
Oklahoma City Northwest's September 2026 forecast shows daily high temperatures ranging from 76° to 95°, with overnight lows between 51° and 74°. The average high for September is 88° with an average low of 66°. 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 Oklahoma City Northwest. See also: October | November | December.
