S
M
T
W
T
F
S
30
77°
50°
31
71°
47°
1
69°
48°
2
69°
47°
3
70°
47°
4
69°
48°
5
68°
47°
6
68°
49°
7
69°
54°
8
69°
50°
9
68°
47°
10
68°
46°
11
67°
47°
12
67°
46°
13
68°
48°
14
67°
49°
15
66°
50°
16
66°
44°
17
67°
43°
18
67°
44°
19
72°
46°
20
Hist. Avg.
72°
48°
21
Hist. Avg.
71°
48°
22
Hist. Avg.
71°
47°
23
Hist. Avg.
70°
47°
24
Hist. Avg.
70°
47°
25
Hist. Avg.
69°
46°
26
Hist. Avg.
69°
46°
27
Hist. Avg.
69°
46°
28
Hist. Avg.
68°
45°
29
Hist. Avg.
68°
45°
30
Hist. Avg.
67°
45°
1
Hist. Avg.
67°
44°
2
Hist. Avg.
66°
44°
3
Hist. Avg.
66°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Elmhurst
Elmhurst's September 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 43° and 54°. The average high for September is 69° with an average low of 47°. 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.
