S
M
T
W
T
F
S
30
79°
57°
31
82°
60°
1
82°
53°
2
83°
52°
3
75°
53°
4
76°
54°
5
77°
60°
6
80°
57°
7
82°
52°
8
74°
56°
9
74°
58°
10
76°
58°
11
79°
57°
12
78°
56°
13
72°
56°
14
72°
50°
15
75°
49°
16
71°
49°
17
71°
52°
18
72°
52°
19
76°
54°
20
71°
55°
21
74°
53°
22
73°
46°
23
71°
51°
24
68°
54°
25
73°
49°
26
66°
49°
27
70°
51°
28
Hist. Avg.
69°
47°
29
Hist. Avg.
69°
46°
30
Hist. Avg.
68°
46°
1
Hist. Avg.
68°
46°
2
Hist. Avg.
67°
45°
3
Hist. Avg.
67°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Belmont
Belmont's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 46° and 60°. The average high for September is 75° 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.
