S
M
T
W
T
F
S
30
85°
71°
31
93°
70°
1
94°
73°
2
97°
72°
3
97°
73°
4
97°
72°
5
97°
70°
6
88°
68°
7
88°
66°
8
88°
63°
9
90°
61°
10
93°
66°
11
97°
72°
12
90°
70°
13
91°
73°
14
95°
70°
15
86°
66°
16
88°
61°
17
91°
61°
18
97°
68°
19
90°
70°
20
91°
68°
21
93°
68°
22
88°
68°
23
68°
63°
24
N/A
25
77°
48°
26
81°
50°
27
82°
51°
28
83°
52°
29
87°
59°
30
86°
62°
1
89°
66°
2
88°
65°
3
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chesterfield
Chesterfield's September 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 48° and 66°. The average high for September is 84° with an average low of 58°. 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.
