S
M
T
W
T
F
S
30
84°
66°
31
86°
71°
1
86°
64°
2
87°
64°
3
83°
70°
4
91°
74°
5
78°
69°
6
76°
67°
7
78°
65°
8
80°
64°
9
82°
63°
10
79°
57°
11
82°
59°
12
73°
58°
13
69°
51°
14
65°
61°
15
73°
50°
16
70°
60°
17
73°
57°
18
70°
64°
19
72°
58°
20
66°
52°
21
67°
51°
22
70°
52°
23
72°
52°
24
70°
55°
25
70°
53°
26
74°
54°
27
72°
52°
28
69°
51°
29
67°
51°
30
69°
48°
1
69°
48°
2
65°
47°
3
67°
48°
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 65° to 74°, with overnight lows between 47° and 64°. The average high for September is 70° 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.
