S
M
T
W
T
F
S
30
89°
73°
31
87°
71°
1
86°
70°
2
87°
70°
3
87°
71°
4
88°
72°
5
88°
71°
6
89°
71°
7
88°
70°
8
87°
71°
9
88°
71°
10
88°
70°
11
87°
72°
12
88°
71°
13
89°
72°
14
90°
70°
15
90°
71°
16
91°
71°
17
90°
70°
18
90°
71°
19
91°
70°
20
91°
71°
21
90°
72°
22
91°
72°
23
91°
71°
24
90°
71°
25
91°
70°
26
90°
71°
27
91°
70°
28
90°
71°
29
91°
70°
30
90°
71°
1
90°
71°
2
91°
70°
3
91°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Alianza
La Alianza's September 2026 forecast shows daily high temperatures ranging from 86° to 91°, with overnight lows between 70° and 73°. The average high for September is 89° with an average low of 71°. 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 La Alianza. See also: October | November | December.