S
M
T
W
T
F
S
30
86°
72°
31
92°
69°
1
96°
72°
2
97°
75°
3
97°
76°
4
97°
76°
5
99°
73°
6
87°
71°
7
85°
71°
8
87°
64°
9
90°
64°
10
94°
71°
11
97°
74°
12
89°
71°
13
91°
73°
14
92°
70°
15
85°
73°
16
88°
66°
17
91°
65°
18
96°
72°
19
90°
71°
20
90°
71°
21
92°
70°
22
87°
66°
23
66°
60°
24
62°
56°
25
76°
47°
26
80°
48°
27
79°
52°
28
80°
54°
29
82°
58°
30
84°
62°
1
86°
65°
2
85°
66°
3
82°
65°
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 76° to 86°, with overnight lows between 47° and 66°. The average high for September is 82° with an average low of 57°. 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.
