S
M
T
W
T
F
S
31
68°
49°
1
70°
50°
2
69°
47°
3
64°
47°
4
67°
49°
5
68°
45°
6
61°
44°
7
62°
46°
8
66°
50°
9
64°
51°
10
66°
50°
11
70°
51°
12
71°
51°
13
71°
52°
14
72°
52°
15
71°
51°
16
67°
52°
17
68°
52°
18
64°
51°
19
68°
46°
20
67°
49°
21
66°
46°
22
68°
45°
23
66°
47°
24
67°
45°
25
66°
45°
26
71°
47°
27
74°
44°
28
69°
46°
29
67°
44°
30
67°
44°
1
68°
46°
2
69°
45°
3
71°
45°
4
72°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Duncan
Duncan's June 2026 forecast shows daily high temperatures ranging from 61° to 74°, with overnight lows between 44° and 52°. The average high for June 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 June weather will actually feel in Duncan. See also: July | August | September.