S
M
T
W
T
F
S
30
83°
55°
31
79°
56°
1
70°
59°
2
75°
59°
3
77°
61°
4
84°
60°
5
73°
56°
6
68°
53°
7
79°
57°
8
82°
59°
9
77°
69°
10
82°
59°
11
74°
49°
12
75°
56°
13
78°
57°
14
80°
56°
15
74°
53°
16
73°
51°
17
69°
51°
18
72°
53°
19
69°
51°
20
73°
54°
21
70°
55°
22
67°
54°
23
67°
54°
24
70°
53°
25
69°
53°
26
71°
52°
27
66°
49°
28
67°
52°
29
72°
53°
30
73°
52°
1
71°
52°
2
70°
51°
3
69°
51°
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 66° to 82°, with overnight lows between 49° and 69°. The average high for September is 72° with an average low of 54°. 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.
