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
74°
50°
8
78°
62°
9
83°
65°
10
76°
51°
11
73°
49°
12
78°
56°
13
78°
57°
14
77°
57°
15
76°
55°
16
73°
47°
17
71°
49°
18
71°
51°
19
68°
47°
20
67°
45°
21
71°
50°
22
65°
50°
23
66°
49°
24
69°
49°
25
72°
48°
26
73°
48°
27
67°
45°
28
71°
49°
29
73°
49°
30
73°
48°
1
72°
48°
2
70°
46°
3
70°
42°
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 65° to 83°, with overnight lows between 42° and 65°. The average high for September is 72° with an average low of 50°. 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.
