S
M
T
W
T
F
S
26
87°
69°
27
88°
67°
28
88°
67°
29
89°
68°
30
90°
67°
31
92°
70°
1
91°
68°
2
92°
67°
3
91°
71°
4
87°
66°
5
87°
67°
6
88°
66°
7
87°
67°
8
86°
67°
9
87°
69°
10
87°
70°
11
86°
71°
12
87°
67°
13
91°
69°
14
92°
67°
15
91°
70°
16
89°
67°
17
86°
70°
18
91°
67°
19
87°
66°
20
86°
67°
21
87°
69°
22
86°
69°
23
86°
70°
24
90°
70°
25
87°
69°
26
89°
70°
27
88°
70°
28
88°
69°
29
85°
70°
30
89°
65°
31
89°
64°
1
84°
64°
2
84°
68°
3
85°
67°
4
84°
68°
5
88°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Duncan
Duncan's August 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 64° and 71°. The average high for August is 88° with an average low of 68°. 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 Duncan. See also: September | October | November.
