S
M
T
W
T
F
S
31
68°
44°
1
62°
43°
2
69°
43°
3
78°
48°
4
75°
56°
5
84°
52°
6
76°
58°
7
82°
58°
8
73°
55°
9
79°
58°
10
72°
62°
11
82°
66°
12
81°
64°
13
79°
62°
14
83°
61°
15
77°
62°
16
78°
60°
17
78°
61°
18
75°
61°
19
76°
62°
20
77°
64°
21
80°
61°
22
75°
62°
23
73°
59°
24
72°
59°
25
72°
61°
26
75°
59°
27
74°
64°
28
78°
63°
29
74°
60°
30
74°
59°
1
75°
62°
2
76°
63°
3
75°
61°
4
76°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Portsmouth
Portsmouth's June 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 55° and 66°. The average high for June is 76° with an average low of 61°. 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 Portsmouth. See also: July | August | September.
