S
M
T
W
T
F
S
30
88°
67°
31
89°
67°
1
87°
66°
2
84°
66°
3
84°
65°
4
85°
61°
5
82°
60°
6
84°
62°
7
84°
64°
8
86°
64°
9
83°
63°
10
83°
63°
11
81°
58°
12
84°
59°
13
87°
61°
14
83°
55°
15
81°
55°
16
80°
56°
17
79°
55°
18
81°
56°
19
85°
56°
20
86°
58°
21
85°
60°
22
85°
61°
23
84°
60°
24
82°
57°
25
83°
56°
26
84°
58°
27
84°
54°
28
83°
58°
29
84°
58°
30
83°
57°
1
84°
57°
2
83°
56°
3
83°
50°
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 79° to 89°, with overnight lows between 50° and 67°. The average high for September is 84° 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.
