S
M
T
W
T
F
S
26
105°
74°
27
106°
81°
28
101°
73°
29
104°
76°
30
108°
84°
31
110°
85°
1
108°
79°
2
103°
81°
3
109°
81°
4
106°
82°
5
106°
77°
6
105°
79°
7
104°
78°
8
103°
76°
9
105°
74°
10
105°
68°
11
99°
77°
12
91°
73°
13
87°
70°
14
97°
73°
15
100°
71°
16
103°
71°
17
101°
77°
18
103°
77°
19
104°
77°
20
103°
69°
21
104°
72°
22
105°
71°
23
105°
71°
24
105°
71°
25
105°
67°
26
107°
71°
27
106°
68°
28
102°
68°
29
103°
67°
30
98°
67°
31
97°
65°
1
96°
66°
2
94°
61°
3
90°
64°
4
96°
66°
5
95°
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 90° to 107°, with overnight lows between 61° and 72°. The average high for August is 101° 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.
