S
M
T
W
T
F
S
30
69°
51°
31
75°
45°
1
82°
38°
2
87°
52°
3
82°
49°
4
88°
49°
5
83°
53°
6
77°
61°
7
70°
53°
8
64°
53°
9
71°
47°
10
79°
49°
11
57°
44°
12
57°
40°
13
66°
36°
14
52°
48°
15
59°
44°
16
62°
46°
17
71°
36°
18
78°
50°
19
68°
50°
20
63°
49°
21
71°
51°
22
75°
52°
23
78°
50°
24
82°
52°
25
83°
52°
26
69°
42°
27
67°
43°
28
66°
42°
29
63°
41°
30
61°
39°
1
64°
34°
2
59°
41°
3
68°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plentywood
Plentywood's September 2026 forecast shows daily high temperatures ranging from 59° to 83°, with overnight lows between 34° and 52°. The average high for September is 70° with an average low of 46°. 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 Plentywood. See also: October | November | December.
