S
M
T
W
T
F
S
27
74°
43°
28
70°
48°
29
78°
41°
30
76°
42°
1
72°
44°
2
76°
47°
3
77°
44°
4
71°
41°
5
74°
41°
6
72°
33°
7
66°
31°
8
65°
32°
9
68°
33°
10
65°
37°
11
71°
39°
12
71°
39°
13
73°
28°
14
65°
28°
15
62°
27°
16
63°
27°
17
61°
30°
18
67°
30°
19
70°
36°
20
72°
37°
21
72°
38°
22
73°
32°
23
71°
31°
24
67°
37°
25
71°
34°
26
72°
25°
27
66°
22°
28
57°
24°
29
55°
30°
30
64°
36°
31
67°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Mission Viejo
Mission Viejo's October 2026 forecast shows daily high temperatures ranging from 55° to 78°, with overnight lows between 22° and 48°. The average high for October is 69° with an average low of 35°. 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 Mission Viejo. See also: November | December | January.
