S
M
T
W
T
F
S
30
86°
59°
31
85°
58°
1
84°
57°
2
85°
57°
3
83°
56°
4
77°
55°
5
82°
57°
6
83°
54°
7
78°
49°
8
72°
54°
9
79°
50°
10
81°
54°
11
81°
53°
12
80°
51°
13
67°
46°
14
67°
51°
15
81°
52°
16
78°
49°
17
69°
47°
18
67°
49°
19
70°
50°
20
78°
50°
21
78°
48°
22
79°
47°
23
75°
47°
24
75°
45°
25
74°
47°
26
77°
37°
27
65°
44°
28
71°
45°
29
75°
41°
30
69°
44°
1
67°
47°
2
73°
45°
3
73°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Deadwood
Deadwood's September 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 37° and 59°. The average high for September is 76° with an average low of 50°. 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 Deadwood. See also: October | November | December.
