S
M
T
W
T
F
S
30
85°
65°
31
84°
66°
1
84°
66°
2
83°
65°
3
83°
66°
4
84°
63°
5
82°
58°
6
83°
59°
7
87°
61°
8
86°
61°
9
85°
62°
10
85°
62°
11
80°
56°
12
81°
57°
13
86°
60°
14
85°
55°
15
79°
54°
16
78°
55°
17
79°
54°
18
80°
55°
19
84°
56°
20
84°
55°
21
83°
60°
22
84°
61°
23
84°
59°
24
81°
57°
25
82°
58°
26
83°
60°
27
83°
58°
28
79°
58°
29
82°
57°
30
82°
58°
1
81°
57°
2
82°
56°
3
81°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coster Yards
Coster Yards's September 2026 forecast shows daily high temperatures ranging from 78° to 87°, with overnight lows between 49° and 66°. The average high for September is 83° with an average low of 59°. 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 Coster Yards. See also: October | November | December.