S
M
T
W
T
F
S
30
79°
69°
31
83°
71°
1
85°
65°
2
83°
64°
3
78°
63°
4
79°
65°
5
78°
72°
6
83°
70°
7
84°
67°
8
77°
68°
9
76°
70°
10
80°
69°
11
79°
68°
12
80°
68°
13
78°
67°
14
75°
62°
15
75°
61°
16
74°
61°
17
74°
62°
18
75°
67°
19
76°
66°
20
77°
67°
21
79°
63°
22
74°
59°
23
72°
64°
24
71°
66°
25
77°
60°
26
76°
57°
27
Hist. Avg.
73°
60°
28
Hist. Avg.
73°
60°
29
Hist. Avg.
72°
60°
30
Hist. Avg.
72°
59°
1
Hist. Avg.
72°
59°
2
Hist. Avg.
71°
58°
3
Hist. Avg.
71°
58°
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 71° to 85°, with overnight lows between 57° and 72°. The average high for September is 78° with an average low of 65°. 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.
