S
M
T
W
T
F
S
31
80°
47°
1
76°
52°
2
79°
48°
3
82°
49°
4
84°
49°
5
85°
55°
6
N/A
7
87°
70°
8
87°
71°
9
83°
70°
10
84°
71°
11
89°
71°
12
88°
66°
13
86°
65°
14
85°
66°
15
86°
65°
16
82°
64°
17
84°
65°
18
83°
66°
19
84°
62°
20
81°
65°
21
84°
66°
22
85°
66°
23
81°
65°
24
81°
63°
25
86°
66°
26
88°
67°
27
85°
66°
28
82°
63°
29
81°
62°
30
82°
62°
1
86°
68°
2
83°
68°
3
87°
67°
4
84°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
June Weather in Portsmouth
Portsmouth's June 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 62° and 71°. The average high for June is 84° 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 Portsmouth. See also: July | August | September.
