S
M
T
W
T
F
S
26
85°
65°
27
88°
70°
28
85°
69°
29
86°
70°
30
82°
72°
31
89°
72°
1
90°
73°
2
91°
76°
3
89°
73°
4
90°
70°
5
82°
74°
6
91°
75°
7
90°
73°
8
89°
74°
9
90°
74°
10
92°
74°
11
93°
74°
12
85°
70°
13
86°
69°
14
85°
68°
15
84°
66°
16
85°
65°
17
84°
67°
18
84°
69°
19
88°
72°
20
89°
70°
21
88°
66°
22
87°
70°
23
89°
72°
24
91°
73°
25
90°
72°
26
88°
71°
27
82°
71°
28
84°
70°
29
86°
71°
30
87°
70°
31
87°
70°
1
86°
67°
2
80°
63°
3
79°
62°
4
79°
62°
5
80°
63°
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 79° to 93°, with overnight lows between 62° and 75°. The average high for August is 86° with an average low of 70°. 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.
