S
M
T
W
T
F
S
28
86°
77°
29
87°
77°
30
86°
76°
1
86°
77°
2
87°
77°
3
86°
76°
4
86°
76°
5
87°
77°
6
86°
77°
7
86°
76°
8
87°
75°
9
86°
76°
10
88°
74°
11
87°
74°
12
87°
76°
13
88°
76°
14
88°
74°
15
89°
75°
16
87°
76°
17
87°
75°
18
88°
74°
19
87°
74°
20
87°
75°
21
88°
75°
22
88°
76°
23
89°
75°
24
88°
76°
25
89°
75°
26
88°
75°
27
88°
76°
28
89°
76°
29
88°
75°
30
88°
75°
31
89°
76°
1
88°
78°
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 86° to 89°, with overnight lows between 74° and 78°. The average high for July is 87° 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 July weather will actually feel in San Juan. See also: August | September | October.
