S
M
T
W
T
F
S
30
88°
64°
31
89°
68°
1
88°
69°
2
94°
71°
3
92°
70°
4
85°
67°
5
81°
63°
6
81°
58°
7
82°
58°
8
81°
61°
9
84°
64°
10
84°
60°
11
80°
54°
12
78°
54°
13
75°
55°
14
76°
54°
15
80°
59°
16
78°
58°
17
79°
57°
18
75°
54°
19
78°
57°
20
80°
58°
21
80°
58°
22
79°
57°
23
80°
57°
24
80°
56°
25
79°
55°
26
78°
54°
27
79°
55°
28
78°
55°
29
77°
54°
30
76°
53°
1
76°
52°
2
75°
52°
3
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chesterhill
Chesterhill's September 2026 forecast shows daily high temperatures ranging from 75° to 94°, with overnight lows between 52° and 71°. The average high for September is 80° with an average low of 58°. 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 Chesterhill. See also: October | November | December.