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
83°
71°
9
80°
64°
10
78°
59°
11
80°
63°
12
83°
61°
13
79°
62°
14
83°
64°
15
74°
53°
16
72°
54°
17
74°
53°
18
71°
50°
19
70°
48°
20
68°
51°
21
73°
50°
22
69°
55°
23
71°
54°
24
76°
55°
25
77°
55°
26
77°
54°
27
76°
55°
28
78°
56°
29
77°
56°
30
76°
55°
1
74°
49°
2
69°
44°
3
62°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Glendale Heights
Glendale Heights's September 2026 forecast shows daily high temperatures ranging from 62° to 83°, with overnight lows between 40° and 71°. The average high for September is 75° with an average low of 55°. 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 Glendale Heights. See also: October | November | December.
