S
M
T
W
T
F
S
30
71°
50°
31
77°
50°
1
71°
47°
2
64°
54°
3
66°
50°
4
71°
48°
5
70°
46°
6
75°
49°
7
70°
55°
8
75°
47°
9
83°
45°
10
69°
51°
11
67°
51°
12
68°
49°
13
64°
54°
14
66°
53°
15
68°
47°
16
77°
44°
17
79°
47°
18
71°
46°
19
69°
44°
20
73°
42°
21
68°
43°
22
69°
46°
23
66°
44°
24
61°
51°
25
63°
38°
26
64°
48°
27
67°
42°
28
66°
54°
29
63°
52°
30
67°
47°
1
66°
47°
2
66°
47°
3
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Jackson Park
Jackson Park's September 2026 forecast shows daily high temperatures ranging from 63° to 67°, with overnight lows between 42° and 54°. The average high for September is 66° with an average low of 48°. 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 Jackson Park. See also: October | November | December.
