S
M
T
W
T
F
S
28
94°
64°
29
90°
64°
30
92°
65°
1
90°
65°
2
95°
54°
3
97°
55°
4
97°
60°
5
92°
59°
6
95°
58°
7
96°
63°
8
97°
65°
9
98°
63°
10
99°
62°
11
97°
64°
12
97°
64°
13
95°
65°
14
95°
64°
15
94°
63°
16
90°
64°
17
93°
64°
18
92°
64°
19
94°
65°
20
95°
65°
21
96°
64°
22
96°
65°
23
95°
66°
24
96°
66°
25
95°
64°
26
94°
64°
27
91°
65°
28
93°
64°
29
94°
64°
30
95°
65°
31
96°
65°
1
95°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in San Ysidro
San Ysidro's July 2026 forecast shows daily high temperatures ranging from 90° to 99°, with overnight lows between 54° and 66°. The average high for July is 95° with an average low of 63°. 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 Ysidro. See also: August | September | October.
