S
M
T
W
T
F
S
28
76°
60°
29
75°
54°
30
78°
60°
1
76°
56°
2
81°
54°
3
87°
56°
4
89°
55°
5
89°
55°
6
90°
58°
7
94°
59°
8
94°
64°
9
93°
63°
10
92°
64°
11
91°
63°
12
94°
65°
13
98°
68°
14
99°
68°
15
100°
69°
16
94°
64°
17
95°
65°
18
94°
66°
19
94°
67°
20
95°
68°
21
96°
68°
22
94°
67°
23
94°
66°
24
93°
63°
25
91°
63°
26
91°
64°
27
93°
65°
28
94°
66°
29
95°
66°
30
96°
67°
31
97°
68°
1
96°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Castaic Junction
Castaic Junction's July 2026 forecast shows daily high temperatures ranging from 87° to 100°, with overnight lows between 55° and 69°. The average high for July is 94° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Castaic Junction. See also: August | September | October.
