S
M
T
W
T
F
S
30
66°
48°
31
65°
49°
1
68°
50°
2
69°
53°
3
69°
53°
4
68°
47°
5
66°
47°
6
64°
50°
7
67°
50°
8
68°
48°
9
68°
52°
10
67°
52°
11
68°
52°
12
68°
49°
13
66°
46°
14
63°
49°
15
62°
50°
16
63°
52°
17
63°
51°
18
66°
50°
19
65°
51°
20
64°
51°
21
67°
48°
22
65°
45°
23
60°
44°
24
60°
46°
25
61°
47°
26
62°
46°
27
61°
47°
28
59°
50°
29
61°
49°
30
62°
48°
1
63°
49°
2
64°
46°
3
59°
43°
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 59° to 69°, with overnight lows between 43° and 53°. The average high for September is 64° with an average low of 49°. 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.