S
M
T
W
T
F
S
31
82°
81°
1
83°
82°
2
83°
82°
3
82°
80°
4
82°
79°
5
83°
81°
6
84°
82°
7
83°
81°
8
83°
82°
9
83°
82°
10
84°
82°
11
85°
82°
12
84°
82°
13
84°
79°
14
84°
80°
15
84°
82°
16
84°
74°
17
86°
79°
18
84°
81°
19
84°
82°
20
83°
82°
21
83°
82°
22
84°
82°
23
84°
81°
24
90°
80°
25
89°
81°
26
91°
80°
27
89°
81°
28
87°
80°
29
90°
80°
30
91°
78°
1
90°
77°
2
91°
78°
3
90°
78°
4
92°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Port Isabel
Port Isabel's June 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 77° and 81°. The average high for June is 90° with an average low of 79°. 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 Port Isabel. See also: July | August | September.
