S
M
T
W
T
F
S
30
88°
66°
31
85°
62°
1
83°
58°
2
86°
64°
3
88°
69°
4
84°
66°
5
85°
64°
6
76°
66°
7
82°
64°
8
84°
63°
9
77°
55°
10
80°
49°
11
85°
62°
12
72°
51°
13
69°
46°
14
61°
44°
15
70°
48°
16
74°
45°
17
73°
57°
18
61°
56°
19
63°
55°
20
70°
54°
21
63°
48°
22
65°
47°
23
67°
52°
24
69°
51°
25
68°
53°
26
70°
55°
27
70°
53°
28
68°
48°
29
68°
50°
30
66°
43°
1
69°
49°
2
60°
46°
3
62°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Belle Plaine
Belle Plaine's September 2026 forecast shows daily high temperatures ranging from 60° to 73°, with overnight lows between 43° and 57°. The average high for September is 67° with an average low of 51°. 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 Belle Plaine. See also: October | November | December.