S
M
T
W
T
F
S
30
78°
55°
31
78°
58°
1
80°
60°
2
83°
59°
3
83°
57°
4
77°
58°
5
77°
56°
6
80°
52°
7
77°
53°
8
78°
54°
9
80°
55°
10
82°
57°
11
82°
57°
12
83°
58°
13
84°
57°
14
83°
54°
15
78°
54°
16
79°
57°
17
82°
57°
18
82°
58°
19
83°
56°
20
83°
57°
21
82°
57°
22
79°
53°
23
76°
51°
24
75°
50°
25
74°
49°
26
73°
51°
27
74°
54°
28
77°
52°
29
81°
49°
30
75°
50°
1
Hist. Avg.
78°
52°
2
Hist. Avg.
78°
52°
3
Hist. Avg.
77°
52°
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 73° to 84°, with overnight lows between 49° and 60°. The average high for September is 79° with an average low of 55°. 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.
