S
M
T
W
T
F
S
30
76°
57°
31
79°
59°
1
79°
58°
2
78°
58°
3
78°
51°
4
72°
49°
5
71°
52°
6
72°
57°
7
77°
57°
8
77°
56°
9
72°
55°
10
70°
56°
11
76°
55°
12
75°
56°
13
76°
56°
14
75°
55°
15
76°
55°
16
75°
54°
17
71°
53°
18
74°
48°
19
67°
46°
20
67°
45°
21
64°
43°
22
65°
47°
23
67°
47°
24
66°
44°
25
64°
43°
26
65°
48°
27
67°
49°
28
70°
50°
29
69°
49°
30
70°
50°
1
65°
49°
2
68°
48°
3
63°
48°
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 43° and 59°. The average high for September is 71° with an average low of 52°. 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.
