S
M
T
W
T
F
S
26
86°
69°
27
86°
68°
28
87°
67°
29
86°
71°
30
87°
73°
31
86°
66°
1
85°
72°
2
87°
73°
3
89°
68°
4
87°
67°
5
85°
66°
6
85°
67°
7
86°
68°
8
84°
67°
9
84°
69°
10
88°
71°
11
85°
68°
12
86°
72°
13
89°
72°
14
84°
71°
15
88°
72°
16
90°
66°
17
88°
65°
18
84°
66°
19
83°
70°
20
83°
65°
21
84°
65°
22
84°
69°
23
83°
70°
24
88°
71°
25
90°
70°
26
89°
64°
27
87°
63°
28
81°
62°
29
81°
64°
30
82°
65°
31
83°
69°
1
86°
69°
2
87°
68°
3
87°
66°
4
85°
69°
5
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chester
Chester's August 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 62° and 73°. The average high for August is 86° with an average low of 68°. 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 Chester. See also: September | October | November.
