S
M
T
W
T
F
S
31
77°
48°
1
82°
49°
2
71°
47°
3
89°
49°
4
85°
49°
5
90°
51°
6
81°
46°
7
82°
47°
8
77°
49°
9
82°
49°
10
86°
50°
11
89°
50°
12
87°
52°
13
85°
49°
14
87°
52°
15
80°
48°
16
84°
52°
17
84°
51°
18
81°
50°
19
82°
49°
20
79°
49°
21
81°
50°
22
81°
49°
23
80°
51°
24
83°
50°
25
82°
49°
26
78°
50°
27
78°
49°
28
82°
50°
29
84°
50°
30
82°
51°
1
81°
52°
2
79°
52°
3
82°
53°
4
80°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Sebastopol
Sebastopol's June 2026 forecast shows daily high temperatures ranging from 71° to 90°, with overnight lows between 46° and 53°. The average high for June is 82° with an average low of 50°. 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 Sebastopol. See also: July | August | September.