S
M
T
W
T
F
S
30
95°
69°
31
97°
73°
1
96°
73°
2
96°
75°
3
98°
72°
4
98°
73°
5
99°
74°
6
94°
73°
7
90°
68°
8
97°
67°
9
94°
68°
10
78°
67°
11
81°
67°
12
90°
66°
13
87°
66°
14
94°
62°
15
99°
74°
16
95°
72°
17
95°
73°
18
95°
73°
19
97°
72°
20
93°
65°
21
76°
65°
22
69°
59°
23
70°
54°
24
68°
57°
25
74°
60°
26
70°
61°
27
74°
57°
28
77°
60°
29
78°
63°
30
71°
58°
1
66°
54°
2
73°
55°
3
75°
52°
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 66° to 78°, with overnight lows between 52° and 63°. The average high for September is 73° with an average low of 58°. 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.