S
M
T
W
T
F
S
30
72°
52°
31
79°
55°
1
79°
46°
2
77°
47°
3
71°
46°
4
72°
48°
5
73°
55°
6
76°
53°
7
78°
47°
8
70°
52°
9
70°
53°
10
71°
52°
11
72°
51°
12
74°
49°
13
70°
50°
14
68°
44°
15
68°
44°
16
67°
42°
17
67°
44°
18
68°
49°
19
71°
49°
20
70°
50°
21
71°
47°
22
67°
40°
23
65°
46°
24
64°
49°
25
70°
43°
26
62°
44°
27
64°
45°
28
Hist. Avg.
70°
46°
29
Hist. Avg.
70°
46°
30
Hist. Avg.
70°
46°
1
Hist. Avg.
69°
45°
2
Hist. Avg.
69°
45°
3
Hist. Avg.
68°
44°
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 62° to 79°, with overnight lows between 40° and 55°. The average high for September is 71° with an average low of 48°. 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.
