S
M
T
W
T
F
S
30
89°
65°
31
86°
75°
1
90°
71°
2
80°
71°
3
92°
73°
4
87°
66°
5
82°
62°
6
81°
64°
7
80°
63°
8
81°
62°
9
79°
61°
10
81°
65°
11
81°
62°
12
81°
63°
13
80°
61°
14
81°
59°
15
76°
63°
16
75°
62°
17
75°
56°
18
73°
54°
19
73°
54°
20
74°
57°
21
77°
61°
22
80°
61°
23
81°
62°
24
81°
60°
25
79°
57°
26
78°
59°
27
79°
60°
28
79°
59°
29
80°
58°
30
73°
54°
1
70°
52°
2
72°
57°
3
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bel Air
Bel Air's September 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 52° and 73°. The average high for September is 79° with an average low of 61°. 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 Bel Air. See also: October | November | December.