S
M
T
W
T
F
S
30
104°
72°
31
102°
67°
1
103°
75°
2
101°
73°
3
97°
73°
4
101°
74°
5
102°
71°
6
105°
72°
7
103°
72°
8
104°
73°
9
103°
78°
10
88°
70°
11
96°
66°
12
95°
72°
13
99°
74°
14
101°
71°
15
103°
75°
16
101°
73°
17
101°
71°
18
101°
72°
19
100°
66°
20
98°
69°
21
89°
67°
22
88°
64°
23
92°
63°
24
89°
63°
25
90°
60°
26
79°
65°
27
87°
68°
28
87°
65°
29
89°
65°
30
91°
71°
1
75°
69°
2
71°
66°
3
70°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Okmulgee
Okmulgee's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Okmulgee. See also: October | November | December.