S
M
T
W
T
F
S
30
85°
65°
31
87°
66°
1
89°
67°
2
91°
69°
3
89°
69°
4
90°
67°
5
88°
63°
6
85°
63°
7
86°
66°
8
86°
68°
9
85°
66°
10
85°
67°
11
89°
66°
12
90°
67°
13
89°
67°
14
89°
68°
15
88°
67°
16
88°
67°
17
87°
66°
18
87°
64°
19
86°
63°
20
86°
58°
21
84°
63°
22
81°
63°
23
83°
62°
24
86°
57°
25
85°
57°
26
83°
61°
27
84°
62°
28
80°
57°
29
83°
60°
30
84°
60°
1
82°
58°
2
83°
59°
3
84°
60°
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 80° to 91°, with overnight lows between 57° and 69°. The average high for September is 86° with an average low of 64°. 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.
