S
M
T
W
T
F
S
30
84°
51°
31
85°
49°
1
86°
50°
2
78°
48°
3
77°
47°
4
79°
46°
5
76°
42°
6
75°
41°
7
74°
45°
8
77°
46°
9
79°
42°
10
75°
47°
11
78°
46°
12
79°
44°
13
79°
38°
14
71°
36°
15
69°
37°
16
70°
39°
17
72°
42°
18
77°
40°
19
73°
42°
20
77°
44°
21
77°
44°
22
76°
45°
23
77°
46°
24
78°
45°
25
76°
44°
26
75°
42°
27
74°
43°
28
71°
40°
29
70°
41°
30
70°
38°
1
63°
39°
2
70°
40°
3
60°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Powder River
Powder River's September 2026 forecast shows daily high temperatures ranging from 60° to 86°, with overnight lows between 29° and 51°. The average high for September is 75° with an average low of 43°. 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 Powder River. See also: October | November | December.
