S
M
T
W
T
F
S
30
75°
56°
31
73°
56°
1
68°
63°
2
67°
60°
3
78°
61°
4
78°
59°
5
72°
58°
6
70°
53°
7
75°
49°
8
76°
51°
9
71°
56°
10
75°
59°
11
70°
49°
12
73°
45°
13
75°
60°
14
66°
50°
15
65°
42°
16
73°
58°
17
72°
59°
18
71°
41°
19
62°
51°
20
59°
48°
21
63°
53°
22
62°
48°
23
65°
52°
24
67°
51°
25
63°
50°
26
65°
49°
27
67°
50°
28
66°
48°
29
67°
45°
30
60°
42°
1
62°
47°
2
64°
45°
3
59°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Union Mills
Union Mills's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 41° and 59°. The average high for September is 65° 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 Mills. See also: October | November | December.
