S
M
T
W
T
F
S
30
80°
61°
31
83°
64°
1
85°
60°
2
86°
59°
3
79°
58°
4
80°
59°
5
81°
65°
6
85°
65°
7
86°
64°
8
80°
64°
9
79°
63°
10
84°
63°
11
84°
60°
12
83°
63°
13
81°
58°
14
80°
56°
15
76°
57°
16
75°
55°
17
75°
55°
18
76°
56°
19
80°
59°
20
81°
60°
21
80°
57°
22
76°
53°
23
74°
57°
24
75°
59°
25
79°
51°
26
78°
50°
27
Hist. Avg.
76°
60°
28
Hist. Avg.
76°
60°
29
Hist. Avg.
75°
59°
30
Hist. Avg.
75°
59°
1
Hist. Avg.
74°
58°
2
Hist. Avg.
74°
58°
3
Hist. Avg.
73°
58°
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 74° to 86°, with overnight lows between 50° and 65°. The average high for September is 80° 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.
