S
M
T
W
T
F
S
28
76°
60°
29
75°
54°
30
78°
60°
1
76°
56°
2
81°
54°
3
89°
51°
4
89°
56°
5
92°
59°
6
92°
60°
7
94°
63°
8
98°
64°
9
97°
65°
10
94°
64°
11
94°
65°
12
95°
68°
13
100°
67°
14
98°
67°
15
100°
69°
16
100°
69°
17
98°
65°
18
94°
66°
19
94°
67°
20
96°
68°
21
97°
68°
22
97°
69°
23
98°
69°
24
98°
68°
25
97°
69°
26
98°
69°
27
97°
68°
28
97°
68°
29
96°
67°
30
98°
69°
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 92° to 100°, with overnight lows between 59° and 69°. The average high for July is 97° with an average low of 67°. 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.
