S
M
T
W
T
F
S
30
95°
65°
31
97°
64°
1
99°
71°
2
99°
73°
3
99°
74°
4
100°
72°
5
102°
73°
6
90°
74°
7
89°
62°
8
93°
59°
9
94°
69°
10
80°
68°
11
84°
66°
12
92°
65°
13
86°
66°
14
88°
61°
15
97°
76°
16
94°
73°
17
97°
71°
18
97°
71°
19
96°
69°
20
92°
67°
21
72°
67°
22
70°
57°
23
72°
58°
24
74°
59°
25
77°
56°
26
76°
57°
27
80°
58°
28
81°
61°
29
77°
59°
30
76°
58°
1
78°
59°
2
75°
52°
3
71°
58°
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 70° to 81°, with overnight lows between 52° and 61°. The average high for September is 76° with an average low of 58°. 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.
