S
M
T
W
T
F
S
30
90°
66°
31
94°
72°
1
96°
71°
2
96°
74°
3
96°
72°
4
99°
72°
5
86°
70°
6
86°
64°
7
84°
62°
8
85°
60°
9
87°
62°
10
95°
69°
11
86°
73°
12
82°
72°
13
88°
69°
14
84°
57°
15
80°
56°
16
85°
60°
17
86°
62°
18
85°
62°
19
82°
64°
20
77°
61°
21
75°
59°
22
71°
54°
23
74°
53°
24
75°
52°
25
75°
57°
26
76°
55°
27
80°
59°
28
80°
56°
29
79°
58°
30
80°
57°
1
75°
55°
2
79°
58°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chesterfield
Chesterfield's September 2026 forecast shows daily high temperatures ranging from 71° to 88°, with overnight lows between 52° and 72°. The average high for September is 79° 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 Chesterfield. See also: October | November | December.
