S
M
T
W
T
F
S
27
81°
66°
28
82°
64°
29
81°
61°
30
78°
58°
1
76°
58°
2
73°
59°
3
71°
56°
4
72°
55°
5
72°
55°
6
71°
59°
7
73°
59°
8
76°
61°
9
78°
59°
10
79°
56°
11
74°
55°
12
72°
51°
13
69°
53°
14
70°
55°
15
73°
59°
16
76°
59°
17
77°
60°
18
78°
60°
19
78°
59°
20
77°
60°
21
78°
61°
22
78°
58°
23
79°
56°
24
72°
55°
25
73°
56°
26
72°
57°
27
70°
56°
28
73°
58°
29
77°
57°
30
74°
52°
31
74°
53°
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 69° to 82°, with overnight lows between 51° and 66°. The average high for October is 75° with an average low of 58°. 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.
