S
M
T
W
T
F
S
30
85°
62°
31
86°
62°
1
87°
61°
2
84°
61°
3
83°
60°
4
83°
62°
5
84°
60°
6
84°
50°
7
74°
50°
8
73°
55°
9
76°
57°
10
72°
59°
11
73°
58°
12
81°
57°
13
82°
48°
14
72°
47°
15
69°
46°
16
68°
47°
17
69°
49°
18
71°
46°
19
77°
45°
20
69°
48°
21
69°
54°
22
74°
54°
23
78°
53°
24
77°
55°
25
75°
54°
26
78°
54°
27
79°
52°
28
75°
48°
29
67°
49°
30
72°
49°
1
73°
47°
2
72°
51°
3
63°
37°
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 63° to 87°, with overnight lows between 37° and 62°. The average high for September is 76° with an average low of 53°. 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.
