S
M
T
W
T
F
S
30
80°
48°
31
80°
53°
1
74°
53°
2
84°
59°
3
84°
58°
4
87°
63°
5
88°
63°
6
74°
54°
7
78°
54°
8
74°
52°
9
72°
50°
10
74°
52°
11
73°
48°
12
67°
52°
13
74°
53°
14
79°
54°
15
76°
54°
16
78°
53°
17
79°
53°
18
74°
52°
19
72°
52°
20
76°
53°
21
75°
51°
22
74°
51°
23
75°
53°
24
75°
52°
25
74°
51°
26
72°
50°
27
73°
51°
28
73°
51°
29
72°
50°
30
71°
49°
1
70°
49°
2
70°
48°
3
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Custer
Custer's September 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 48° and 63°. The average high for September is 75° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Custer. See also: October | November | December.
