S
M
T
W
T
F
S
30
90°
74°
31
90°
73°
1
89°
75°
2
89°
74°
3
88°
73°
4
89°
73°
5
90°
74°
6
89°
73°
7
87°
74°
8
87°
74°
9
88°
75°
10
87°
74°
11
88°
73°
12
88°
73°
13
87°
74°
14
88°
72°
15
89°
74°
16
90°
74°
17
88°
73°
18
87°
71°
19
89°
73°
20
89°
74°
21
88°
73°
22
89°
74°
23
88°
73°
24
88°
73°
25
89°
72°
26
88°
71°
27
85°
72°
28
87°
71°
29
86°
70°
30
85°
72°
1
84°
70°
2
85°
70°
3
86°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Allandale
Allandale's September 2026 forecast shows daily high temperatures ranging from 84° to 90°, with overnight lows between 70° and 75°. The average high for September is 88° with an average low of 73°. 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 Allandale. See also: October | November | December.