S
M
T
W
T
F
S
30
89°
69°
31
89°
69°
1
88°
68°
2
89°
69°
3
87°
68°
4
83°
64°
5
83°
64°
6
86°
65°
7
88°
67°
8
88°
67°
9
87°
68°
10
88°
68°
11
89°
67°
12
88°
68°
13
88°
67°
14
87°
65°
15
88°
65°
16
88°
63°
17
86°
64°
18
78°
57°
19
81°
56°
20
78°
55°
21
78°
56°
22
80°
57°
23
81°
61°
24
84°
55°
25
82°
54°
26
76°
53°
27
77°
55°
28
80°
56°
29
79°
59°
30
81°
54°
1
78°
58°
2
80°
58°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Belton
Belton's September 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 53° and 69°. The average high for September is 84° 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 Belton. See also: October | November | December.