S
M
T
W
T
F
S
26
88°
72°
27
91°
73°
28
93°
74°
29
89°
70°
30
86°
63°
31
88°
63°
1
87°
66°
2
87°
71°
3
89°
69°
4
85°
70°
5
88°
68°
6
88°
68°
7
88°
69°
8
90°
70°
9
90°
68°
10
91°
69°
11
92°
67°
12
91°
69°
13
92°
71°
14
94°
72°
15
94°
74°
16
94°
73°
17
97°
73°
18
91°
70°
19
92°
70°
20
93°
71°
21
87°
69°
22
84°
68°
23
88°
65°
24
88°
63°
25
85°
65°
26
86°
67°
27
83°
68°
28
84°
67°
29
85°
68°
30
87°
68°
31
90°
69°
1
91°
67°
2
88°
65°
3
87°
64°
4
85°
66°
5
86°
67°
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 83° to 91°, with overnight lows between 64° and 69°. The average high for August is 86° with an average low of 67°. 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.
