S
M
T
W
T
F
S
30
80°
61°
31
82°
64°
1
82°
64°
2
80°
63°
3
83°
55°
4
77°
55°
5
75°
57°
6
76°
62°
7
82°
61°
8
77°
59°
9
75°
60°
10
76°
61°
11
82°
62°
12
82°
61°
13
81°
61°
14
82°
60°
15
81°
60°
16
80°
59°
17
78°
52°
18
73°
51°
19
71°
49°
20
71°
48°
21
69°
49°
22
70°
51°
23
71°
49°
24
75°
50°
25
73°
56°
26
75°
56°
27
76°
55°
28
76°
55°
29
75°
53°
30
74°
51°
1
71°
52°
2
74°
54°
3
68°
47°
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 68° to 83°, with overnight lows between 47° and 64°. The average high for September is 76° with an average low of 56°. 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.
