S
M
T
W
T
F
S
31
76°
61°
1
77°
68°
2
78°
67°
3
74°
69°
4
77°
67°
5
82°
66°
6
77°
67°
7
79°
66°
8
79°
67°
9
80°
68°
10
82°
69°
11
80°
69°
12
81°
69°
13
80°
68°
14
81°
69°
15
81°
70°
16
82°
71°
17
81°
70°
18
78°
66°
19
78°
68°
20
79°
68°
21
79°
69°
22
80°
68°
23
79°
68°
24
79°
69°
25
80°
70°
26
80°
69°
27
81°
69°
28
80°
70°
29
81°
70°
30
80°
69°
1
82°
69°
2
81°
70°
3
81°
70°
4
82°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Castro
Castro's June 2026 forecast shows daily high temperatures ranging from 77° to 82°, with overnight lows between 66° and 71°. The average high for June is 80° with an average low of 69°. 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 Castro. See also: July | August | September.