S
M
T
W
T
F
S
31
88°
54°
1
85°
57°
2
83°
54°
3
89°
54°
4
88°
55°
5
86°
55°
6
82°
57°
7
81°
57°
8
81°
54°
9
85°
59°
10
92°
59°
11
92°
62°
12
94°
62°
13
90°
62°
14
90°
58°
15
91°
61°
16
91°
58°
17
83°
56°
18
77°
58°
19
75°
57°
20
80°
51°
21
81°
54°
22
87°
55°
23
91°
57°
24
93°
54°
25
91°
53°
26
89°
58°
27
84°
57°
28
82°
56°
29
81°
57°
30
84°
58°
1
90°
62°
2
93°
63°
3
93°
61°
4
92°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Castaic Junction
Castaic Junction's June 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 53° and 63°. The average high for June is 88° with an average low of 58°. 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 Castaic Junction. See also: July | August | September.
