S
M
T
W
T
F
S
30
83°
75°
31
83°
75°
1
84°
76°
2
83°
73°
3
84°
75°
4
87°
76°
5
87°
75°
6
82°
76°
7
86°
73°
8
84°
73°
9
82°
71°
10
82°
71°
11
83°
72°
12
84°
72°
13
83°
71°
14
85°
72°
15
84°
74°
16
85°
74°
17
85°
69°
18
84°
68°
19
80°
69°
20
79°
73°
21
82°
70°
22
83°
69°
23
80°
73°
24
82°
73°
25
83°
72°
26
80°
72°
27
83°
71°
28
80°
71°
29
79°
70°
30
78°
70°
1
80°
71°
2
81°
65°
3
80°
66°
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 78° to 87°, with overnight lows between 65° and 76°. The average high for September is 83° with an average low of 72°. 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.
