S
M
T
W
T
F
S
31
96°
75°
1
97°
79°
2
97°
78°
3
98°
77°
4
96°
79°
5
92°
79°
6
95°
80°
7
91°
80°
8
93°
79°
9
96°
78°
10
96°
80°
11
97°
78°
12
97°
79°
13
96°
78°
14
98°
77°
15
97°
79°
16
100°
82°
17
98°
80°
18
99°
81°
19
97°
80°
20
94°
79°
21
95°
80°
22
94°
80°
23
95°
79°
24
95°
79°
25
96°
78°
26
94°
80°
27
95°
80°
28
94°
79°
29
95°
80°
30
95°
80°
1
96°
79°
2
98°
79°
3
97°
80°
4
98°
79°
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 91° to 100°, with overnight lows between 77° and 82°. The average high for June is 96° 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 San Juan. See also: July | August | September.
