S
M
T
W
T
F
S
26
64°
46°
27
59°
45°
28
54°
46°
29
61°
44°
30
76°
50°
1
74°
50°
2
83°
50°
3
87°
55°
4
88°
51°
5
74°
48°
6
73°
50°
7
68°
49°
8
69°
48°
9
70°
50°
10
70°
48°
11
68°
49°
12
67°
48°
13
63°
43°
14
63°
45°
15
66°
46°
16
63°
47°
17
62°
47°
18
62°
46°
19
63°
46°
20
62°
47°
21
60°
46°
22
61°
45°
23
65°
47°
24
68°
48°
25
69°
49°
26
69°
48°
27
66°
48°
28
65°
47°
29
66°
49°
30
69°
50°
31
68°
49°
1
62°
49°
2
64°
48°
3
66°
49°
4
63°
50°
5
65°
49°
6
68°
50°
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 60° to 88°, with overnight lows between 43° and 55°. The average high for May is 68° with an average low of 48°. 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.
