S
M
T
W
T
F
S
28
68°
53°
29
65°
52°
30
64°
49°
1
67°
47°
2
72°
50°
3
75°
58°
4
74°
52°
5
77°
55°
6
87°
48°
7
77°
56°
8
76°
51°
9
77°
53°
10
74°
52°
11
75°
50°
12
75°
50°
13
81°
52°
14
82°
55°
15
81°
54°
16
80°
54°
17
77°
53°
18
79°
54°
19
81°
55°
20
76°
54°
21
77°
54°
22
79°
57°
23
80°
57°
24
80°
58°
25
79°
53°
26
76°
54°
27
79°
55°
28
78°
55°
29
74°
57°
30
75°
53°
31
79°
56°
1
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Custer
Custer's July 2026 forecast shows daily high temperatures ranging from 74° to 82°, with overnight lows between 50° and 58°. The average high for July is 78° with an average low of 54°. 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 Custer. See also: August | September | October.