S
M
T
W
T
F
S
26
80°
60°
27
82°
48°
28
85°
53°
29
85°
57°
30
86°
59°
1
86°
54°
2
80°
60°
3
87°
63°
4
86°
60°
5
78°
56°
6
80°
48°
7
86°
50°
8
94°
58°
9
98°
62°
10
99°
63°
11
97°
69°
12
102°
69°
13
99°
68°
14
96°
65°
15
93°
62°
16
94°
56°
17
91°
59°
18
87°
54°
19
92°
57°
20
89°
55°
21
89°
51°
22
91°
55°
23
88°
52°
24
94°
56°
25
96°
60°
26
87°
58°
27
90°
53°
28
93°
57°
29
94°
57°
30
94°
58°
31
95°
51°
1
96°
56°
2
97°
57°
3
98°
56°
4
93°
57°
5
94°
58°
6
98°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Duncan
Duncan's May 2026 forecast shows daily high temperatures ranging from 87° to 98°, with overnight lows between 51° and 60°. The average high for May is 93° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Duncan. See also: June | July | August.
