S
M
T
W
T
F
S
31
66°
39°
1
65°
44°
2
75°
42°
3
83°
48°
4
87°
51°
5
85°
57°
6
72°
57°
7
73°
51°
8
79°
47°
9
85°
54°
10
89°
56°
11
88°
68°
12
89°
69°
13
84°
60°
14
84°
57°
15
75°
60°
16
75°
54°
17
79°
49°
18
71°
59°
19
74°
61°
20
71°
57°
21
72°
54°
22
73°
54°
23
73°
59°
24
78°
56°
25
80°
58°
26
72°
59°
27
80°
60°
28
83°
60°
29
84°
57°
30
86°
67°
1
93°
69°
2
93°
74°
3
92°
67°
4
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Alton Bay
Alton Bay's June 2026 forecast shows daily high temperatures ranging from 84° to 93°, with overnight lows between 57° and 74°. The average high for June is 89° with an average low of 66°. 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 Alton Bay. See also: July | August | September.
