S
M
T
W
T
F
S
27
82°
47°
28
81°
45°
29
82°
46°
30
81°
47°
1
81°
53°
2
86°
52°
3
88°
51°
4
87°
52°
5
85°
50°
6
81°
49°
7
82°
45°
8
81°
47°
9
80°
47°
10
80°
45°
11
Hist. Avg.
76°
51°
12
Hist. Avg.
76°
51°
13
Hist. Avg.
76°
50°
14
Hist. Avg.
75°
50°
15
Hist. Avg.
75°
50°
16
Hist. Avg.
75°
50°
17
Hist. Avg.
75°
50°
18
Hist. Avg.
74°
50°
19
Hist. Avg.
74°
49°
20
Hist. Avg.
74°
49°
21
Hist. Avg.
74°
49°
22
Hist. Avg.
73°
49°
23
Hist. Avg.
73°
48°
24
Hist. Avg.
73°
48°
25
Hist. Avg.
72°
48°
26
Hist. Avg.
72°
48°
27
Hist. Avg.
72°
48°
28
Hist. Avg.
72°
47°
29
Hist. Avg.
71°
47°
30
Hist. Avg.
71°
47°
31
Hist. Avg.
70°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Portola Valley
Portola Valley's October 2026 forecast shows daily high temperatures ranging from 80° to 88°, with overnight lows between 45° and 53°. The average high for October is 83° with an average low of 48°. 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 Portola Valley. See also: November | December | January.
