S
M
T
W
T
F
S
31
77°
50°
1
78°
51°
2
81°
53°
3
78°
56°
4
66°
50°
5
70°
52°
6
68°
45°
7
67°
44°
8
72°
41°
9
77°
42°
10
82°
56°
11
83°
56°
12
85°
52°
13
76°
59°
14
86°
59°
15
86°
57°
16
83°
56°
17
86°
57°
18
88°
56°
19
90°
59°
20
81°
62°
21
84°
63°
22
79°
65°
23
76°
62°
24
74°
61°
25
73°
57°
26
81°
55°
27
86°
58°
28
83°
58°
29
88°
57°
30
84°
57°
1
81°
53°
2
84°
52°
3
89°
55°
4
87°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chesterton
Chesterton's September 2025 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 Chesterton. See also: October | November | December.
