S
M
T
W
T
F
S
30
81°
68°
31
87°
70°
1
94°
70°
2
94°
71°
3
88°
69°
4
89°
69°
5
87°
68°
6
83°
62°
7
78°
60°
8
77°
61°
9
78°
60°
10
76°
57°
11
74°
55°
12
75°
53°
13
74°
56°
14
77°
54°
15
79°
59°
16
80°
59°
17
79°
58°
18
78°
59°
19
80°
59°
20
80°
58°
21
79°
58°
22
80°
57°
23
79°
58°
24
79°
58°
25
78°
57°
26
79°
57°
27
78°
56°
28
77°
56°
29
76°
55°
30
76°
54°
1
75°
54°
2
76°
53°
3
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Elgin
South Elgin's September 2026 forecast shows daily high temperatures ranging from 74° to 94°, with overnight lows between 53° and 71°. The average high for September is 80° with an average low of 59°. 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 South Elgin. See also: October | November | December.
