S
M
T
W
T
F
S
30
78°
67°
31
88°
71°
1
90°
71°
2
90°
71°
3
87°
74°
4
92°
74°
5
81°
69°
6
81°
65°
7
79°
59°
8
81°
63°
9
83°
57°
10
78°
55°
11
78°
63°
12
77°
59°
13
72°
64°
14
84°
61°
15
71°
53°
16
70°
54°
17
72°
53°
18
67°
52°
19
66°
50°
20
66°
51°
21
67°
50°
22
73°
44°
23
73°
54°
24
75°
55°
25
73°
54°
26
75°
55°
27
74°
54°
28
73°
54°
29
70°
53°
30
72°
50°
1
66°
49°
2
65°
50°
3
69°
50°
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 84°, with overnight lows between 44° and 64°. 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.
