S
M
T
W
T
F
S
30
87°
70°
31
86°
69°
1
94°
74°
2
92°
73°
3
92°
70°
4
91°
70°
5
81°
68°
6
83°
61°
7
81°
59°
8
85°
65°
9
89°
67°
10
90°
68°
11
81°
61°
12
82°
65°
13
85°
66°
14
86°
65°
15
85°
67°
16
80°
57°
17
82°
60°
18
82°
62°
19
80°
59°
20
78°
56°
21
81°
61°
22
78°
60°
23
74°
60°
24
74°
59°
25
75°
59°
26
79°
58°
27
78°
57°
28
78°
58°
29
79°
59°
30
79°
58°
1
78°
57°
2
77°
56°
3
77°
55°
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 74° to 90°, with overnight lows between 55° and 68°. The average high for September is 80° with an average low of 61°. 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.
