S
M
T
W
T
F
S
30
73°
52°
31
73°
51°
1
74°
49°
2
73°
49°
3
74°
50°
4
76°
54°
5
74°
56°
6
73°
49°
7
73°
52°
8
74°
55°
9
72°
48°
10
72°
47°
11
73°
51°
12
74°
52°
13
74°
45°
14
71°
54°
15
75°
55°
16
79°
55°
17
76°
50°
18
77°
43°
19
68°
42°
20
66°
43°
21
67°
43°
22
72°
51°
23
74°
51°
24
73°
46°
25
74°
40°
26
69°
41°
27
64°
40°
28
63°
39°
29
64°
40°
30
64°
38°
1
Hist. Avg.
71°
46°
2
Hist. Avg.
70°
46°
3
Hist. Avg.
70°
45°
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 79°, with overnight lows between 38° and 56°. The average high for September is 72° with an average low of 48°. 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.
