S
M
T
W
T
F
S
31
88°
79°
1
89°
78°
2
88°
76°
3
87°
75°
4
88°
76°
5
87°
78°
6
87°
78°
7
86°
79°
8
86°
76°
9
85°
76°
10
85°
75°
11
86°
76°
12
86°
76°
13
87°
75°
14
86°
75°
15
86°
74°
16
87°
75°
17
86°
77°
18
86°
76°
19
87°
76°
20
87°
75°
21
86°
76°
22
86°
76°
23
87°
75°
24
86°
76°
25
85°
75°
26
84°
76°
27
86°
78°
28
86°
77°
29
87°
76°
30
86°
76°
1
86°
75°
2
87°
77°
3
86°
77°
4
86°
75°
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 84° to 89°, with overnight lows between 74° and 79°. The average high for June is 86° 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.
