S
M
T
W
T
F
S
30
71°
54°
31
72°
53°
1
70°
53°
2
69°
52°
3
69°
53°
4
68°
50°
5
69°
48°
6
67°
48°
7
67°
51°
8
68°
52°
9
66°
51°
10
68°
52°
11
67°
51°
12
67°
51°
13
66°
50°
14
67°
51°
15
68°
50°
16
65°
52°
17
66°
50°
18
62°
50°
19
62°
51°
20
Hist. Avg.
60°
50°
21
Hist. Avg.
60°
50°
22
Hist. Avg.
60°
50°
23
Hist. Avg.
60°
50°
24
Hist. Avg.
59°
49°
25
Hist. Avg.
59°
49°
26
Hist. Avg.
59°
49°
27
Hist. Avg.
59°
49°
28
Hist. Avg.
59°
49°
29
Hist. Avg.
59°
49°
30
Hist. Avg.
59°
48°
1
Hist. Avg.
58°
48°
2
Hist. Avg.
58°
48°
3
Hist. Avg.
58°
48°
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 62° to 72°, with overnight lows between 48° and 54°. The average high for September is 67° with an average low of 51°. 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.
