S
M
T
W
T
F
S
31
64°
43°
1
71°
49°
2
76°
44°
3
83°
53°
4
89°
57°
5
86°
64°
6
76°
58°
7
68°
51°
8
72°
54°
9
76°
57°
10
80°
60°
11
81°
62°
12
76°
59°
13
76°
60°
14
77°
60°
15
80°
64°
16
82°
56°
17
71°
54°
18
76°
61°
19
79°
59°
20
72°
56°
21
79°
54°
22
71°
54°
23
72°
55°
24
73°
62°
25
74°
64°
26
81°
55°
27
73°
56°
28
74°
56°
29
74°
57°
30
75°
57°
1
74°
56°
2
75°
58°
3
81°
63°
4
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Willsboro
Willsboro's June 2026 forecast shows daily high temperatures ranging from 68° to 89°, with overnight lows between 51° and 64°. The average high for June is 77° 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 Willsboro. See also: July | August | September.