S
M
T
W
T
F
S
30
78°
57°
31
77°
57°
1
76°
63°
2
75°
64°
3
83°
63°
4
84°
64°
5
83°
59°
6
78°
55°
7
76°
59°
8
79°
55°
9
75°
53°
10
74°
54°
11
74°
54°
12
76°
53°
13
75°
59°
14
80°
57°
15
72°
52°
16
71°
56°
17
72°
55°
18
71°
58°
19
75°
50°
20
73°
53°
21
74°
51°
22
77°
50°
23
72°
49°
24
72°
49°
25
71°
54°
26
73°
55°
27
73°
56°
28
76°
55°
29
76°
47°
30
69°
50°
1
69°
55°
2
75°
54°
3
74°
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 69° to 84°, with overnight lows between 47° and 64°. The average high for September is 75° with an average low of 55°. 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.
