S
M
T
W
T
F
S
30
87°
64°
31
79°
66°
1
88°
66°
2
89°
67°
3
89°
66°
4
90°
61°
5
89°
57°
6
80°
54°
7
81°
56°
8
83°
62°
9
82°
54°
10
79°
52°
11
76°
51°
12
75°
56°
13
77°
60°
14
77°
50°
15
83°
49°
16
76°
48°
17
73°
49°
18
73°
49°
19
74°
48°
20
72°
47°
21
73°
48°
22
74°
48°
23
74°
49°
24
77°
55°
25
78°
54°
26
80°
48°
27
79°
56°
28
72°
48°
29
79°
49°
30
75°
48°
1
73°
49°
2
70°
45°
3
69°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Elwood
Elwood's September 2026 forecast shows daily high temperatures ranging from 69° to 90°, with overnight lows between 45° and 67°. The average high for September is 78° with an average low of 54°. 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 Elwood. See also: October | November | December.