S
M
T
W
T
F
S
28
91°
78°
29
91°
80°
30
92°
79°
1
92°
79°
2
91°
79°
3
89°
78°
4
91°
80°
5
89°
81°
6
91°
79°
7
89°
79°
8
89°
79°
9
91°
79°
10
90°
80°
11
90°
80°
12
90°
81°
13
90°
81°
14
91°
78°
15
90°
80°
16
90°
79°
17
92°
79°
18
91°
81°
19
91°
79°
20
91°
81°
21
88°
79°
22
93°
78°
23
90°
77°
24
90°
80°
25
89°
79°
26
89°
78°
27
89°
78°
28
91°
79°
29
89°
77°
30
89°
75°
31
88°
76°
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 91°, with overnight lows between 75° and 80°. The average high for July is 89° with an average low of 78°. 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.
