S
M
T
W
T
F
S
30
85°
53°
31
77°
56°
1
77°
60°
2
79°
54°
3
82°
57°
4
83°
60°
5
84°
55°
6
83°
51°
7
75°
50°
8
74°
49°
9
75°
52°
10
80°
56°
11
78°
49°
12
74°
49°
13
73°
48°
14
74°
55°
15
79°
51°
16
80°
47°
17
72°
46°
18
70°
46°
19
70°
47°
20
71°
48°
21
69°
50°
22
69°
47°
23
70°
50°
24
70°
47°
25
73°
53°
26
76°
52°
27
76°
43°
28
71°
49°
29
69°
51°
30
74°
51°
1
67°
49°
2
70°
47°
3
65°
42°
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 65° to 85°, with overnight lows between 42° and 60°. The average high for September is 75° 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 Mount Sterling. See also: October | November | December.