S
M
T
W
T
F
S
30
103°
78°
31
103°
75°
1
103°
78°
2
102°
75°
3
97°
74°
4
99°
73°
5
101°
71°
6
101°
71°
7
101°
72°
8
99°
74°
9
99°
76°
10
97°
71°
11
99°
72°
12
93°
71°
13
92°
67°
14
89°
66°
15
86°
61°
16
90°
66°
17
89°
67°
18
80°
61°
19
83°
65°
20
85°
66°
21
88°
65°
22
87°
64°
23
87°
64°
24
86°
63°
25
88°
63°
26
86°
59°
27
77°
53°
28
76°
51°
29
75°
53°
30
81°
57°
1
85°
60°
2
84°
54°
3
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clayton
Clayton's September 2026 forecast shows daily high temperatures ranging from 73° to 102°, with overnight lows between 51° and 76°. The average high for September is 89° with an average low of 65°. 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 Clayton. See also: October | November | December.
