S
M
T
W
T
F
S
28
90°
77°
29
89°
78°
30
91°
79°
1
91°
78°
2
90°
78°
3
91°
77°
4
92°
78°
5
91°
78°
6
90°
77°
7
90°
78°
8
91°
78°
9
89°
77°
10
88°
78°
11
88°
78°
12
89°
77°
13
90°
76°
14
88°
77°
15
89°
76°
16
88°
77°
17
88°
77°
18
89°
76°
19
88°
77°
20
88°
77°
21
89°
76°
22
88°
77°
23
88°
77°
24
90°
76°
25
91°
76°
26
90°
77°
27
91°
78°
28
90°
77°
29
91°
76°
30
90°
77°
31
90°
77°
1
89°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in San Juan
San Juan's July 2026 forecast shows daily high temperatures ranging from 88° to 92°, with overnight lows between 76° and 79°. The average high for July is 90° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in San Juan. See also: August | September | October.
