S
M
T
W
T
F
S
30
89°
62°
31
90°
63°
1
90°
62°
2
89°
61°
3
89°
62°
4
87°
62°
5
88°
61°
6
88°
52°
7
84°
51°
8
77°
54°
9
78°
58°
10
76°
59°
11
81°
58°
12
83°
58°
13
86°
48°
14
81°
48°
15
74°
49°
16
72°
48°
17
73°
47°
18
74°
47°
19
79°
45°
20
73°
46°
21
73°
54°
22
75°
54°
23
81°
53°
24
81°
55°
25
80°
54°
26
80°
54°
27
81°
53°
28
79°
49°
29
74°
48°
30
76°
50°
1
76°
48°
2
78°
52°
3
68°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sterling
Sterling's September 2026 forecast shows daily high temperatures ranging from 68° to 90°, with overnight lows between 39° and 63°. The average high for September is 80° 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 Sterling. See also: October | November | December.
