S
M
T
W
T
F
S
30
76°
55°
31
76°
59°
1
80°
58°
2
82°
61°
3
82°
60°
4
81°
54°
5
76°
54°
6
75°
55°
7
75°
56°
8
78°
58°
9
75°
59°
10
74°
58°
11
79°
57°
12
81°
59°
13
80°
58°
14
80°
59°
15
79°
58°
16
79°
58°
17
78°
57°
18
78°
51°
19
77°
53°
20
74°
48°
21
70°
49°
22
70°
52°
23
73°
53°
24
75°
48°
25
71°
48°
26
72°
54°
27
71°
51°
28
68°
51°
29
73°
52°
30
74°
51°
1
72°
50°
2
73°
51°
3
74°
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 68° to 82°, with overnight lows between 48° and 61°. The average high for September is 76° 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.
