S
M
T
W
T
F
S
30
104°
75°
31
101°
71°
1
101°
71°
2
100°
74°
3
95°
72°
4
100°
74°
5
100°
73°
6
102°
73°
7
102°
74°
8
103°
74°
9
103°
77°
10
85°
70°
11
98°
67°
12
106°
72°
13
101°
77°
14
101°
76°
15
101°
77°
16
101°
77°
17
99°
72°
18
99°
71°
19
99°
77°
20
93°
69°
21
84°
63°
22
81°
59°
23
83°
63°
24
84°
64°
25
85°
67°
26
84°
64°
27
81°
60°
28
82°
62°
29
81°
58°
30
78°
54°
1
78°
60°
2
77°
56°
3
78°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oklahoma City
Oklahoma City's September 2026 forecast shows daily high temperatures ranging from 77° to 99°, with overnight lows between 54° and 77°. The average high for September is 83° with an average low of 63°. 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. See also: October | November | December.
