S
M
T
W
T
F
S
30
75°
50°
31
76°
50°
1
74°
51°
2
74°
52°
3
75°
52°
4
72°
53°
5
75°
52°
6
74°
51°
7
72°
50°
8
73°
48°
9
71°
49°
10
73°
55°
11
71°
48°
12
71°
48°
13
74°
47°
14
74°
54°
15
73°
54°
16
72°
51°
17
70°
46°
18
70°
46°
19
71°
47°
20
75°
52°
21
71°
47°
22
68°
49°
23
73°
50°
24
72°
51°
25
73°
50°
26
67°
42°
27
70°
44°
28
65°
43°
29
64°
42°
30
Hist. Avg.
70°
47°
1
Hist. Avg.
69°
46°
2
Hist. Avg.
69°
46°
3
Hist. Avg.
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Union Vale
Union Vale's September 2026 forecast shows daily high temperatures ranging from 64° to 76°, with overnight lows between 42° and 55°. The average high for September is 72° with an average low of 49°. 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 Union Vale. See also: October | November | December.