S
M
T
W
T
F
S
30
87°
61°
31
82°
59°
1
81°
60°
2
81°
61°
3
82°
64°
4
83°
63°
5
87°
61°
6
80°
63°
7
80°
58°
8
81°
59°
9
80°
58°
10
80°
56°
11
79°
56°
12
77°
57°
13
78°
56°
14
77°
60°
15
78°
61°
16
81°
57°
17
82°
58°
18
82°
56°
19
83°
61°
20
Hist. Avg.
78°
54°
21
Hist. Avg.
78°
54°
22
Hist. Avg.
78°
53°
23
Hist. Avg.
77°
53°
24
Hist. Avg.
77°
52°
25
Hist. Avg.
76°
52°
26
Hist. Avg.
76°
52°
27
Hist. Avg.
76°
51°
28
Hist. Avg.
75°
51°
29
Hist. Avg.
75°
51°
30
Hist. Avg.
74°
50°
1
Hist. Avg.
74°
50°
2
Hist. Avg.
74°
50°
3
Hist. Avg.
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chesterfield
Chesterfield's September 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 56° and 64°. The average high for September is 81° 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.
