S
M
T
W
T
F
S
26
97°
75°
27
97°
76°
28
96°
77°
29
97°
77°
30
97°
76°
31
96°
77°
1
96°
76°
2
97°
77°
3
97°
78°
4
98°
77°
5
98°
78°
6
99°
78°
7
98°
77°
8
98°
78°
9
97°
77°
10
98°
77°
11
98°
78°
12
97°
77°
13
98°
77°
14
98°
76°
15
97°
75°
16
98°
76°
17
91°
71°
18
92°
70°
19
92°
71°
20
91°
69°
21
90°
69°
22
89°
68°
23
90°
66°
24
89°
66°
25
89°
68°
26
90°
66°
27
88°
65°
28
88°
65°
29
89°
66°
30
90°
65°
31
93°
68°
1
93°
70°
2
94°
69°
3
94°
69°
4
93°
71°
5
93°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in McAlester
McAlester's August 2026 forecast shows daily high temperatures ranging from 88° to 99°, with overnight lows between 65° and 78°. The average high for August is 94° with an average low of 73°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in McAlester. See also: September | October | November.