S
M
T
W
T
F
S
26
101°
75°
27
105°
76°
28
103°
71°
29
103°
75°
30
104°
75°
31
106°
75°
1
98°
69°
2
94°
64°
3
101°
69°
4
102°
70°
5
101°
71°
6
101°
73°
7
100°
72°
8
96°
67°
9
97°
65°
10
100°
68°
11
100°
67°
12
93°
64°
13
93°
68°
14
94°
68°
15
95°
67°
16
97°
66°
17
93°
64°
18
95°
64°
19
101°
66°
20
102°
72°
21
102°
73°
22
100°
74°
23
99°
68°
24
101°
66°
25
103°
67°
26
101°
68°
27
100°
72°
28
98°
69°
29
99°
72°
30
99°
71°
31
99°
71°
1
91°
66°
2
94°
69°
3
93°
73°
4
90°
66°
5
93°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Ysidro
San Ysidro's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in San Ysidro. See also: September | October | November.
