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
84°
72°
9
81°
67°
10
79°
60°
11
80°
64°
12
82°
64°
13
78°
62°
14
79°
62°
15
73°
55°
16
71°
56°
17
74°
55°
18
70°
52°
19
69°
49°
20
68°
53°
21
72°
52°
22
68°
57°
23
71°
56°
24
76°
57°
25
77°
57°
26
76°
56°
27
76°
57°
28
77°
57°
29
77°
58°
30
76°
57°
1
73°
51°
2
69°
46°
3
62°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Elmhurst
Elmhurst's September 2026 forecast shows daily high temperatures ranging from 62° to 84°, with overnight lows between 42° and 72°. The average high for September is 75° with an average low of 57°. 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 Elmhurst. See also: October | November | December.
