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
78°
62°
9
80°
65°
10
74°
51°
11
73°
51°
12
78°
63°
13
78°
54°
14
71°
57°
15
76°
55°
16
73°
51°
17
71°
50°
18
62°
44°
19
62°
43°
20
64°
42°
21
63°
45°
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 62° to 80°, with overnight lows between 42° and 65°. The average high for September is 71° 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.
