S
M
T
W
T
F
S
30
78°
60°
31
79°
65°
1
82°
60°
2
83°
59°
3
76°
58°
4
77°
59°
5
77°
64°
6
82°
64°
7
82°
63°
8
80°
63°
9
76°
64°
10
80°
63°
11
81°
61°
12
80°
63°
13
79°
59°
14
79°
56°
15
74°
59°
16
72°
56°
17
73°
55°
18
72°
55°
19
75°
57°
20
76°
60°
21
77°
59°
22
71°
54°
23
73°
57°
24
72°
59°
25
75°
52°
26
73°
52°
27
Hist. Avg.
75°
56°
28
Hist. Avg.
75°
55°
29
Hist. Avg.
74°
55°
30
Hist. Avg.
74°
55°
1
Hist. Avg.
74°
54°
2
Hist. Avg.
73°
54°
3
Hist. Avg.
73°
54°
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 71° to 83°, with overnight lows between 52° and 65°. The average high for September is 77° with an average low of 59°. 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.
