S
M
T
W
T
F
S
30
77°
46°
31
67°
45°
1
67°
47°
2
70°
53°
3
67°
46°
4
66°
54°
5
71°
53°
6
74°
47°
7
71°
45°
8
67°
44°
9
65°
43°
10
65°
50°
11
67°
43°
12
67°
43°
13
65°
42°
14
64°
50°
15
70°
49°
16
68°
40°
17
71°
40°
18
61°
39°
19
60°
40°
20
60°
41°
21
61°
42°
22
58°
40°
23
59°
44°
24
62°
45°
25
63°
45°
26
66°
46°
27
66°
42°
28
65°
36°
29
58°
36°
30
58°
43°
1
57°
44°
2
60°
45°
3
63°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Belmont
Belmont's September 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 36° and 54°. The average high for September is 65° with an average low of 44°. 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 Belmont. See also: October | November | December.
