S
M
T
W
T
F
S
31
71°
37°
1
79°
46°
2
88°
55°
3
68°
51°
4
71°
47°
5
65°
47°
6
61°
42°
7
63°
45°
8
68°
47°
9
69°
48°
10
72°
48°
11
69°
46°
12
72°
48°
13
76°
47°
14
70°
48°
15
64°
48°
16
67°
47°
17
75°
52°
18
75°
50°
19
69°
47°
20
74°
48°
21
75°
52°
22
77°
53°
23
75°
49°
24
70°
47°
25
73°
47°
26
75°
48°
27
68°
45°
28
67°
48°
29
69°
46°
30
75°
50°
1
72°
47°
2
76°
53°
3
79°
55°
4
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Boston Harbor
Boston Harbor's June 2026 forecast shows daily high temperatures ranging from 61° to 88°, with overnight lows between 42° and 55°. The average high for June is 72° with an average low of 49°. 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 Boston Harbor. See also: July | August | September.
