S
M
T
W
T
F
S
30
90°
71°
31
N/A
1
86°
65°
2
89°
69°
3
93°
67°
4
95°
71°
5
92°
68°
6
91°
68°
7
88°
68°
8
90°
62°
9
81°
57°
10
80°
55°
11
80°
56°
12
81°
58°
13
80°
57°
14
76°
52°
15
82°
58°
16
82°
59°
17
81°
60°
18
82°
59°
19
81°
57°
20
80°
58°
21
82°
59°
22
82°
59°
23
81°
58°
24
80°
58°
25
79°
57°
26
80°
56°
27
79°
55°
28
79°
55°
29
78°
56°
30
78°
56°
1
77°
55°
2
78°
55°
3
78°
54°
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 76° to 95°, with overnight lows between 52° and 71°. The average high for September is 82° 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 Elgin. See also: October | November | December.
