S
M
T
W
T
F
S
26
86°
71°
27
87°
71°
28
85°
70°
29
85°
71°
30
86°
71°
31
88°
70°
1
90°
71°
2
89°
70°
3
90°
69°
4
86°
70°
5
88°
70°
6
85°
71°
7
90°
66°
8
87°
65°
9
86°
66°
10
90°
66°
11
90°
67°
12
89°
69°
13
90°
70°
14
90°
70°
15
89°
69°
16
86°
70°
17
86°
69°
18
85°
68°
19
90°
65°
20
84°
65°
21
84°
66°
22
85°
67°
23
84°
64°
24
84°
63°
25
85°
63°
26
87°
68°
27
88°
69°
28
89°
68°
29
88°
68°
30
88°
67°
31
87°
64°
1
87°
63°
2
81°
61°
3
82°
62°
4
85°
64°
5
86°
63°
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 81° to 90°, with overnight lows between 61° and 71°. The average high for August is 87° 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.
