S
M
T
W
T
F
S
30
91°
69°
31
93°
70°
1
91°
70°
2
90°
65°
3
89°
64°
4
88°
64°
5
88°
65°
6
89°
67°
7
92°
70°
8
92°
70°
9
91°
68°
10
91°
68°
11
92°
68°
12
88°
69°
13
90°
66°
14
94°
62°
15
89°
62°
16
88°
63°
17
87°
62°
18
88°
63°
19
88°
63°
20
91°
65°
21
88°
66°
22
85°
66°
23
85°
65°
24
86°
65°
25
85°
64°
26
85°
65°
27
87°
64°
28
87°
64°
29
86°
63°
30
87°
63°
1
89°
62°
2
89°
61°
3
90°
57°
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 85° to 94°, with overnight lows between 57° and 70°. The average high for September is 89° with an average low of 65°. 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.