S
M
T
W
T
F
S
30
77°
56°
31
77°
58°
1
76°
56°
2
75°
57°
3
77°
54°
4
77°
56°
5
75°
53°
6
74°
51°
7
73°
51°
8
76°
57°
9
76°
58°
10
76°
58°
11
76°
58°
12
77°
58°
13
74°
58°
14
72°
57°
15
72°
50°
16
72°
49°
17
75°
50°
18
74°
49°
19
74°
49°
20
73°
50°
21
72°
47°
22
72°
48°
23
71°
48°
24
68°
47°
25
72°
46°
26
72°
47°
27
73°
48°
28
70°
48°
29
70°
47°
30
71°
47°
1
71°
46°
2
72°
48°
3
73°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Union
La Union's September 2026 forecast shows daily high temperatures ranging from 68° to 77°, with overnight lows between 46° and 58°. The average high for September is 73° with an average low of 51°. 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 Union. See also: October | November | December.
