S
M
T
W
T
F
S
30
78°
59°
31
79°
61°
1
81°
58°
2
79°
53°
3
78°
51°
4
75°
53°
5
76°
54°
6
78°
54°
7
82°
58°
8
83°
61°
9
84°
55°
10
79°
52°
11
76°
60°
12
78°
57°
13
81°
51°
14
75°
49°
15
73°
49°
16
74°
51°
17
75°
57°
18
80°
48°
19
75°
56°
20
76°
53°
21
80°
55°
22
77°
56°
23
80°
56°
24
74°
55°
25
78°
56°
26
78°
55°
27
80°
55°
28
79°
54°
29
79°
54°
30
78°
53°
1
79°
52°
2
79°
44°
3
77°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Sterling
Mount Sterling's September 2026 forecast shows daily high temperatures ranging from 73° to 84°, with overnight lows between 43° and 61°. The average high for September is 78° with an average low of 54°. 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 Mount Sterling. See also: October | November | December.