S
M
T
W
T
F
S
30
82°
71°
31
91°
72°
1
94°
72°
2
93°
71°
3
93°
72°
4
93°
73°
5
89°
71°
6
79°
67°
7
82°
65°
8
85°
67°
9
84°
64°
10
81°
57°
11
81°
56°
12
79°
58°
13
65°
52°
14
71°
52°
15
71°
59°
16
70°
57°
17
74°
64°
18
77°
63°
19
73°
63°
20
69°
59°
21
60°
53°
22
61°
46°
23
67°
51°
24
65°
55°
25
67°
55°
26
68°
56°
27
70°
51°
28
71°
53°
29
69°
51°
30
71°
50°
1
72°
53°
2
70°
44°
3
69°
51°
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 72°, with overnight lows between 44° and 56°. The average high for September is 68° 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.