S
M
T
W
T
F
S
30
77°
57°
31
73°
57°
1
72°
58°
2
76°
55°
3
78°
51°
4
76°
51°
5
76°
56°
6
77°
56°
7
77°
57°
8
76°
55°
9
76°
56°
10
77°
56°
11
76°
55°
12
76°
55°
13
75°
54°
14
75°
55°
15
74°
53°
16
75°
46°
17
73°
45°
18
66°
52°
19
70°
54°
20
73°
53°
21
72°
52°
22
72°
49°
23
69°
48°
24
72°
44°
25
Hist. Avg.
63°
41°
26
Hist. Avg.
63°
41°
27
Hist. Avg.
63°
40°
28
Hist. Avg.
62°
40°
29
Hist. Avg.
62°
40°
30
Hist. Avg.
62°
39°
1
Hist. Avg.
61°
39°
2
Hist. Avg.
61°
39°
3
Hist. Avg.
60°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Upper Mills
Upper Mills's September 2026 forecast shows daily high temperatures ranging from 66° to 78°, with overnight lows between 44° and 58°. The average high for September is 74° with an average low of 53°. 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 Upper Mills. See also: October | November | December.
