S
M
T
W
T
F
S
27
87°
60°
28
79°
63°
29
69°
57°
30
70°
55°
1
75°
52°
2
70°
57°
3
73°
54°
4
76°
52°
5
77°
54°
6
79°
56°
7
82°
55°
8
82°
57°
9
80°
56°
10
83°
58°
11
83°
60°
12
81°
58°
13
81°
53°
14
77°
54°
15
74°
53°
16
61°
47°
17
62°
40°
18
67°
46°
19
75°
52°
20
76°
54°
21
81°
56°
22
83°
66°
23
83°
56°
24
79°
56°
25
76°
51°
26
72°
53°
27
76°
50°
28
78°
49°
29
71°
52°
30
70°
54°
31
73°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in San Ysidro
San Ysidro's October 2026 forecast shows daily high temperatures ranging from 70° to 73°, with overnight lows between 54° and 56°. The average high for October is 72° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in San Ysidro. See also: November | December | January.
