S
M
T
W
T
F
S
27
74°
60°
28
74°
62°
29
75°
64°
30
73°
62°
1
74°
63°
2
73°
61°
3
73°
62°
4
74°
63°
5
72°
58°
6
72°
58°
7
76°
62°
8
78°
61°
9
79°
64°
10
77°
61°
11
72°
59°
12
73°
61°
13
75°
62°
14
77°
60°
15
76°
62°
16
73°
63°
17
75°
58°
18
72°
57°
19
73°
58°
20
73°
57°
21
75°
55°
22
72°
53°
23
70°
53°
24
70°
54°
25
71°
56°
26
72°
53°
27
71°
54°
28
71°
55°
29
72°
58°
30
74°
56°
31
73°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Fountain Valley
Fountain Valley's October 2026 forecast shows daily high temperatures ranging from 70° to 79°, with overnight lows between 53° and 64°. The average high for October is 74° with an average low of 59°. 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 Fountain Valley. See also: November | December | January.
