S
M
T
W
T
F
S
31
77°
59°
1
73°
50°
2
81°
55°
3
73°
59°
4
81°
56°
5
82°
58°
6
91°
67°
7
92°
55°
8
75°
60°
9
84°
65°
10
85°
63°
11
84°
57°
12
77°
53°
13
73°
52°
14
74°
53°
15
72°
51°
16
68°
53°
17
76°
54°
18
71°
55°
19
76°
59°
20
79°
55°
21
73°
53°
22
77°
59°
23
81°
60°
24
81°
56°
25
72°
53°
26
72°
53°
27
73°
60°
28
75°
61°
29
74°
61°
30
76°
60°
1
78°
62°
2
83°
63°
3
83°
62°
4
76°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Mandan
Mandan's June 2026 forecast shows daily high temperatures ranging from 68° to 92°, with overnight lows between 51° and 67°. The average high for June is 78° with an average low of 58°. 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 Mandan. See also: July | August | September.