S
M
T
W
T
F
S
30
77°
60°
31
80°
61°
1
76°
55°
2
77°
55°
3
75°
54°
4
75°
53°
5
76°
54°
6
76°
60°
7
79°
58°
8
75°
57°
9
75°
59°
10
76°
53°
11
77°
59°
12
79°
59°
13
78°
60°
14
81°
58°
15
80°
58°
16
79°
57°
17
74°
59°
18
79°
58°
19
78°
57°
20
77°
56°
21
78°
49°
22
76°
48°
23
75°
54°
24
76°
55°
25
69°
51°
26
Hist. Avg.
72°
52°
27
Hist. Avg.
71°
52°
28
Hist. Avg.
71°
51°
29
Hist. Avg.
70°
51°
30
Hist. Avg.
70°
51°
1
Hist. Avg.
70°
50°
2
Hist. Avg.
69°
50°
3
Hist. Avg.
69°
50°
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 69° to 81°, with overnight lows between 48° and 61°. The average high for September is 77° with an average low of 56°. 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.
