S
M
T
W
T
F
S
30
80°
48°
31
73°
46°
1
72°
46°
2
71°
47°
3
71°
46°
4
72°
46°
5
70°
47°
6
70°
47°
7
71°
52°
8
71°
50°
9
69°
46°
10
70°
45°
11
69°
45°
12
69°
47°
13
70°
46°
14
69°
47°
15
68°
49°
16
68°
42°
17
69°
41°
18
69°
42°
19
67°
51°
20
69°
50°
21
Hist. Avg.
69°
44°
22
Hist. Avg.
68°
44°
23
Hist. Avg.
68°
44°
24
Hist. Avg.
68°
44°
25
Hist. Avg.
67°
43°
26
Hist. Avg.
67°
43°
27
Hist. Avg.
66°
43°
28
Hist. Avg.
66°
42°
29
Hist. Avg.
66°
42°
30
Hist. Avg.
65°
42°
1
Hist. Avg.
65°
41°
2
Hist. Avg.
64°
41°
3
Hist. Avg.
64°
41°
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 67° to 80°, with overnight lows between 41° and 52°. The average high for September is 70° with an average low of 47°. 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.
