S
M
T
W
T
F
S
30
87°
71°
31
93°
68°
1
96°
71°
2
99°
73°
3
99°
73°
4
97°
73°
5
97°
70°
6
90°
71°
7
81°
65°
8
87°
66°
9
89°
69°
10
88°
69°
11
90°
68°
12
86°
69°
13
86°
69°
14
90°
68°
15
89°
69°
16
84°
62°
17
83°
62°
18
84°
64°
19
85°
60°
20
78°
65°
21
86°
65°
22
85°
64°
23
84°
63°
24
83°
63°
25
84°
62°
26
85°
63°
27
85°
63°
28
84°
62°
29
83°
62°
30
83°
61°
1
82°
62°
2
81°
60°
3
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Elgin
Elgin's September 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 60° and 71°. The average high for September is 85° 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 Elgin. See also: October | November | December.
