S
M
T
W
T
F
S
30
80°
64°
31
79°
66°
1
86°
71°
2
85°
69°
3
83°
69°
4
84°
70°
5
82°
68°
6
83°
68°
7
84°
68°
8
83°
68°
9
83°
67°
10
82°
68°
11
83°
67°
12
82°
67°
13
83°
66°
14
83°
67°
15
82°
67°
16
83°
66°
17
82°
67°
18
78°
64°
19
74°
60°
20
74°
60°
21
75°
59°
22
75°
60°
23
76°
63°
24
75°
61°
25
75°
60°
26
76°
62°
27
75°
59°
28
75°
61°
29
74°
63°
30
74°
62°
1
75°
62°
2
74°
63°
3
74°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Avalon
Avalon's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 59° and 71°. The average high for September is 79° with an average low of 65°. 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 Avalon. See also: October | November | December.