S
M
T
W
T
F
S
30
81°
62°
31
77°
63°
1
79°
63°
2
82°
58°
3
82°
53°
4
74°
54°
5
73°
61°
6
79°
57°
7
78°
53°
8
73°
55°
9
72°
57°
10
73°
60°
11
75°
59°
12
80°
60°
13
80°
59°
14
79°
54°
15
79°
52°
16
70°
53°
17
71°
49°
18
71°
49°
19
70°
46°
20
68°
46°
21
67°
48°
22
68°
55°
23
69°
47°
24
71°
53°
25
73°
55°
26
70°
54°
27
75°
55°
28
75°
51°
29
74°
49°
30
67°
49°
1
68°
50°
2
73°
51°
3
71°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Elmhurst
South Elmhurst's September 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 46° and 63°. The average high for September is 74° with an average low of 54°. 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 South Elmhurst. See also: October | November | December.
