S
M
T
W
T
F
S
27
88°
69°
28
82°
64°
29
84°
60°
30
82°
64°
1
84°
60°
2
103°
62°
3
101°
75°
4
100°
78°
5
101°
77°
6
100°
71°
7
96°
70°
8
95°
62°
9
89°
64°
10
86°
63°
11
80°
59°
12
73°
55°
13
75°
54°
14
76°
56°
15
81°
56°
16
86°
57°
17
88°
56°
18
87°
57°
19
78°
52°
20
81°
56°
21
80°
55°
22
80°
56°
23
79°
56°
24
79°
55°
25
80°
55°
26
79°
54°
27
75°
50°
28
69°
47°
29
69°
46°
30
70°
47°
31
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Rancho Santa Margarita
Rancho Santa Margarita's October 2026 forecast shows daily high temperatures ranging from 69° to 100°, with overnight lows between 46° and 71°. The average high for October is 81° with an average low of 56°. 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 Rancho Santa Margarita. See also: November | December | January.
