S
M
T
W
T
F
S
30
83°
69°
31
87°
71°
1
95°
77°
2
96°
78°
3
91°
77°
4
93°
76°
5
81°
72°
6
79°
68°
7
81°
64°
8
85°
65°
9
80°
71°
10
77°
64°
11
82°
60°
12
88°
66°
13
75°
56°
14
74°
66°
15
79°
63°
16
74°
65°
17
77°
62°
18
77°
60°
19
77°
60°
20
69°
53°
21
70°
52°
22
71°
54°
23
73°
53°
24
72°
54°
25
73°
52°
26
72°
53°
27
76°
54°
28
75°
54°
29
73°
54°
30
72°
53°
1
74°
52°
2
74°
52°
3
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glen Ellyn
Glen Ellyn's September 2026 forecast shows daily high temperatures ranging from 69° to 79°, with overnight lows between 51° and 66°. The average high for September is 74° with an average low of 56°. 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 Glen Ellyn. See also: October | November | December.
