S
M
T
W
T
F
S
26
75°
55°
27
80°
60°
28
80°
60°
29
75°
59°
30
81°
55°
31
75°
53°
1
74°
53°
2
75°
54°
3
75°
56°
4
79°
59°
5
78°
59°
6
79°
56°
7
79°
57°
8
81°
59°
9
81°
58°
10
80°
52°
11
75°
51°
12
76°
54°
13
75°
51°
14
77°
51°
15
75°
54°
16
75°
56°
17
73°
56°
18
74°
52°
19
74°
51°
20
75°
50°
21
74°
51°
22
78°
57°
23
76°
56°
24
79°
56°
25
80°
48°
26
79°
48°
27
73°
49°
28
72°
50°
29
72°
53°
30
71°
54°
31
72°
55°
1
77°
50°
2
72°
51°
3
73°
49°
4
71°
47°
5
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chesterfield
Chesterfield's August 2026 forecast shows daily high temperatures ranging from 71° to 81°, with overnight lows between 47° and 60°. The average high for August is 76° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Chesterfield. See also: September | October | November.