S
M
T
W
T
F
S
31
83°
48°
1
87°
51°
2
81°
52°
3
79°
52°
4
82°
56°
5
85°
54°
6
69°
52°
7
77°
46°
8
70°
59°
9
73°
52°
10
87°
56°
11
92°
57°
12
86°
53°
13
87°
54°
14
86°
53°
15
85°
54°
16
84°
53°
17
84°
53°
18
86°
54°
19
84°
52°
20
85°
53°
21
86°
50°
22
81°
47°
23
85°
50°
24
81°
50°
25
87°
52°
26
88°
52°
27
86°
51°
28
85°
51°
29
82°
52°
30
81°
50°
1
82°
50°
2
84°
52°
3
86°
53°
4
84°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Portola Valley
Portola Valley's June 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 47° and 59°. The average high for June is 84° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Portola Valley. See also: July | August | September.
