S
M
T
W
T
F
S
30
74°
58°
31
75°
59°
1
74°
58°
2
74°
57°
3
74°
57°
4
75°
58°
5
76°
61°
6
75°
62°
7
73°
60°
8
74°
57°
9
72°
56°
10
73°
55°
11
72°
54°
12
73°
55°
13
73°
56°
14
72°
58°
15
78°
61°
16
78°
62°
17
77°
61°
18
78°
53°
19
77°
51°
20
70°
51°
21
68°
57°
22
70°
58°
23
75°
58°
24
74°
59°
25
75°
49°
26
74°
47°
27
66°
49°
28
64°
48°
29
65°
48°
30
66°
53°
1
65°
55°
2
Hist. Avg.
69°
48°
3
Hist. Avg.
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chesterton
Chesterton's September 2026 forecast shows daily high temperatures ranging from 64° to 78°, with overnight lows between 47° and 62°. The average high for September is 73° with an average low of 56°. 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.
