S
M
T
W
T
F
S
27
82°
67°
28
N/A
29
80°
61°
30
78°
65°
1
80°
62°
2
87°
62°
3
101°
68°
4
98°
70°
5
95°
70°
6
89°
70°
7
82°
68°
8
82°
68°
9
78°
66°
10
77°
67°
11
71°
63°
12
N/A
13
74°
55°
14
82°
58°
15
94°
72°
16
96°
71°
17
92°
65°
18
87°
67°
19
85°
66°
20
76°
60°
21
77°
57°
22
79°
60°
23
79°
62°
24
81°
63°
25
82°
61°
26
75°
58°
27
77°
61°
28
78°
61°
29
78°
60°
30
77°
61°
31
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Fountain Valley
Fountain Valley's October 2026 forecast shows daily high temperatures ranging from 74° to 96°, with overnight lows between 55° and 72°. The average high for October is 81° with an average low of 62°. 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.
