S
M
T
W
T
F
S
31
91°
75°
1
88°
73°
2
88°
74°
3
90°
72°
4
88°
73°
5
88°
72°
6
89°
73°
7
89°
72°
8
91°
72°
9
93°
73°
10
90°
74°
11
91°
74°
12
91°
75°
13
93°
76°
14
94°
76°
15
92°
75°
16
89°
73°
17
89°
73°
18
90°
72°
19
89°
73°
20
90°
74°
21
91°
76°
22
92°
77°
23
92°
78°
24
93°
76°
25
94°
77°
26
93°
75°
27
91°
75°
28
90°
76°
29
90°
75°
30
91°
75°
1
90°
76°
2
91°
74°
3
93°
75°
4
93°
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 88° to 94°, with overnight lows between 72° and 78°. The average high for June is 91° with an average low of 74°. 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.
