S
M
T
W
T
F
S
30
73°
61°
31
74°
61°
1
84°
67°
2
81°
62°
3
81°
64°
4
74°
62°
5
71°
55°
6
70°
50°
7
70°
43°
8
75°
47°
9
79°
62°
10
77°
60°
11
74°
51°
12
74°
66°
13
78°
53°
14
65°
47°
15
72°
61°
16
79°
59°
17
73°
51°
18
69°
48°
19
68°
43°
20
64°
43°
21
67°
45°
22
68°
46°
23
70°
49°
24
69°
43°
25
63°
42°
26
67°
48°
27
72°
48°
28
71°
45°
29
63°
42°
30
69°
48°
1
70°
46°
2
64°
45°
3
67°
46°
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 63° to 79°, with overnight lows between 42° and 66°. The average high for September is 69° with an average low of 48°. 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.
