S
M
T
W
T
F
S
30
106°
76°
31
104°
75°
1
103°
70°
2
102°
75°
3
100°
78°
4
100°
75°
5
102°
78°
6
102°
77°
7
103°
77°
8
104°
78°
9
104°
78°
10
84°
67°
11
90°
71°
12
95°
71°
13
96°
75°
14
98°
71°
15
93°
63°
16
85°
64°
17
84°
62°
18
83°
58°
19
74°
55°
20
80°
57°
21
79°
58°
22
77°
57°
23
81°
55°
24
84°
62°
25
86°
62°
26
85°
61°
27
85°
62°
28
84°
61°
29
84°
60°
30
83°
59°
1
82°
58°
2
83°
59°
3
84°
59°
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 74° to 98°, with overnight lows between 55° and 75°. The average high for September is 85° with an average low of 62°. 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.