S
M
T
W
T
F
S
30
91°
65°
31
95°
70°
1
96°
72°
2
97°
73°
3
97°
74°
4
98°
74°
5
100°
74°
6
90°
75°
7
89°
66°
8
94°
62°
9
89°
71°
10
80°
71°
11
80°
71°
12
91°
69°
13
91°
67°
14
89°
66°
15
96°
69°
16
96°
73°
17
96°
70°
18
98°
69°
19
98°
71°
20
95°
68°
21
84°
69°
22
73°
58°
23
70°
56°
24
72°
59°
25
75°
56°
26
77°
58°
27
N/A
28
82°
55°
29
85°
50°
30
91°
63°
1
90°
69°
2
71°
61°
3
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Chester
Chester's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Chester. See also: October | November | December.
