S
M
T
W
T
F
S
26
87°
70°
27
85°
61°
28
85°
62°
29
87°
68°
30
91°
66°
31
92°
65°
1
87°
67°
2
88°
63°
3
87°
62°
4
84°
61°
5
85°
62°
6
85°
62°
7
86°
63°
8
85°
66°
9
86°
68°
10
85°
63°
11
86°
66°
12
91°
69°
13
92°
65°
14
92°
62°
15
87°
61°
16
85°
63°
17
89°
67°
18
92°
63°
19
84°
61°
20
83°
60°
21
84°
63°
22
84°
60°
23
83°
63°
24
83°
64°
25
84°
66°
26
82°
67°
27
89°
67°
28
90°
66°
29
90°
61°
30
88°
59°
31
81°
64°
1
85°
64°
2
81°
61°
3
85°
64°
4
82°
65°
5
88°
65°
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 92°, with overnight lows between 59° and 70°. The average high for August is 86° with an average low of 64°. 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.
