S
M
T
W
T
F
S
30
97°
70°
31
96°
73°
1
97°
71°
2
95°
70°
3
93°
69°
4
92°
70°
5
92°
71°
6
93°
72°
7
96°
72°
8
96°
71°
9
95°
71°
10
96°
72°
11
94°
71°
12
95°
71°
13
95°
70°
14
94°
68°
15
90°
69°
16
91°
69°
17
93°
70°
18
88°
69°
19
88°
68°
20
91°
69°
21
93°
70°
22
88°
69°
23
89°
64°
24
93°
63°
25
86°
62°
26
87°
62°
27
89°
61°
28
Hist. Avg.
87°
64°
29
Hist. Avg.
86°
64°
30
Hist. Avg.
86°
63°
1
Hist. Avg.
86°
63°
2
Hist. Avg.
86°
63°
3
Hist. Avg.
85°
62°
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 86° to 97°, with overnight lows between 61° and 73°. The average high for September is 92° with an average low of 69°. 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.
