S
M
T
W
T
F
S
31
66°
48°
1
66°
45°
2
65°
45°
3
66°
47°
4
66°
46°
5
67°
46°
6
66°
49°
7
66°
50°
8
67°
49°
9
67°
49°
10
68°
48°
11
70°
51°
12
75°
49°
13
71°
48°
14
70°
48°
15
71°
55°
16
73°
56°
17
78°
55°
18
78°
56°
19
80°
57°
20
80°
58°
21
79°
57°
22
80°
59°
23
80°
58°
24
81°
54°
25
80°
54°
26
80°
59°
27
79°
58°
28
82°
59°
29
81°
60°
30
80°
59°
1
82°
52°
2
79°
56°
3
78°
60°
4
76°
61°
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 65° to 82°, with overnight lows between 45° and 61°. The average high for June is 74° with an average low of 53°. 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.
