S
M
T
W
T
F
S
31
91°
80°
1
94°
79°
2
92°
78°
3
91°
77°
4
88°
78°
5
86°
77°
6
84°
79°
7
84°
79°
8
83°
80°
9
86°
78°
10
84°
78°
11
87°
80°
12
86°
78°
13
86°
80°
14
88°
82°
15
88°
80°
16
89°
81°
17
88°
81°
18
87°
82°
19
87°
81°
20
88°
79°
21
87°
79°
22
86°
80°
23
87°
80°
24
86°
78°
25
87°
81°
26
86°
80°
27
86°
79°
28
86°
79°
29
84°
78°
30
86°
80°
1
86°
80°
2
87°
79°
3
86°
82°
4
85°
81°
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 83° to 94°, with overnight lows between 77° and 82°. The average high for June is 87° with an average low of 80°. 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.
