S
M
T
W
T
F
S
30
72°
55°
31
70°
54°
1
70°
50°
2
68°
59°
3
75°
64°
4
66°
55°
5
70°
54°
6
77°
54°
7
70°
59°
8
63°
54°
9
63°
54°
10
64°
48°
11
68°
52°
12
70°
50°
13
72°
63°
14
73°
61°
15
67°
51°
16
64°
52°
17
63°
46°
18
62°
56°
19
66°
50°
20
65°
53°
21
69°
55°
22
68°
54°
23
67°
54°
24
65°
52°
25
65°
51°
26
64°
50°
27
62°
50°
28
63°
51°
29
62°
50°
30
62°
48°
1
61°
47°
2
62°
48°
3
62°
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 61° to 73°, with overnight lows between 46° and 61°. The average high for September is 65° with an average low of 51°. 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.
