S
M
T
W
T
F
S
31
87°
75°
1
87°
74°
2
88°
74°
3
87°
75°
4
88°
73°
5
87°
73°
6
86°
75°
7
87°
77°
8
88°
77°
9
89°
76°
10
88°
76°
11
89°
75°
12
88°
76°
13
89°
75°
14
88°
78°
15
88°
78°
16
89°
76°
17
88°
75°
18
89°
78°
19
88°
74°
20
88°
76°
21
89°
76°
22
88°
75°
23
88°
76°
24
89°
75°
25
88°
76°
26
89°
75°
27
88°
76°
28
89°
75°
29
88°
74°
30
88°
76°
1
89°
75°
2
88°
76°
3
88°
77°
4
89°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in San Juan
San Juan's June 2026 forecast shows daily high temperatures ranging from 86° to 89°, with overnight lows between 73° and 78°. The average high for June is 88° with an average low of 76°. 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 San Juan. See also: July | August | September.
