S
M
T
W
T
F
S
30
103°
78°
31
103°
75°
1
103°
78°
2
103°
75°
3
97°
75°
4
102°
73°
5
105°
74°
6
106°
74°
7
104°
74°
8
103°
78°
9
101°
76°
10
92°
71°
11
93°
74°
12
100°
75°
13
99°
77°
14
98°
76°
15
89°
66°
16
88°
65°
17
87°
65°
18
87°
62°
19
84°
62°
20
81°
61°
21
92°
68°
22
89°
68°
23
89°
68°
24
88°
67°
25
81°
67°
26
83°
66°
27
85°
66°
28
86°
65°
29
83°
65°
30
83°
59°
1
75°
54°
2
74°
52°
3
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McAlester
McAlester's September 2026 forecast shows daily high temperatures ranging from 72° to 103°, with overnight lows between 51° and 78°. 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 McAlester. See also: October | November | December.
