S
M
T
W
T
F
S
26
80°
68°
27
80°
68°
28
75°
57°
29
81°
50°
30
82°
52°
31
80°
64°
1
73°
64°
2
78°
60°
3
77°
54°
4
81°
53°
5
75°
59°
6
77°
55°
7
82°
59°
8
79°
61°
9
74°
62°
10
79°
61°
11
82°
59°
12
80°
61°
13
80°
56°
14
85°
61°
15
79°
60°
16
82°
63°
17
78°
55°
18
79°
63°
19
77°
48°
20
79°
44°
21
76°
52°
22
75°
57°
23
71°
48°
24
71°
48°
25
75°
46°
26
78°
58°
27
74°
54°
28
77°
48°
29
76°
56°
30
81°
66°
31
83°
70°
1
85°
69°
2
81°
64°
3
82°
63°
4
80°
66°
5
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Custer
Custer's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Custer. See also: September | October | November.