S
M
T
W
T
F
S
30
79°
69°
31
80°
61°
1
80°
61°
2
73°
60°
3
74°
65°
4
76°
69°
5
81°
61°
6
80°
59°
7
72°
59°
8
73°
66°
9
75°
66°
10
75°
64°
11
72°
64°
12
70°
63°
13
71°
57°
14
70°
56°
15
69°
57°
16
69°
61°
17
70°
63°
18
76°
64°
19
77°
64°
20
76°
62°
21
75°
59°
22
72°
61°
23
69°
54°
24
68°
53°
25
65°
53°
26
66°
53°
27
73°
61°
28
74°
61°
29
Hist. Avg.
71°
53°
30
Hist. Avg.
71°
53°
1
Hist. Avg.
70°
53°
2
Hist. Avg.
70°
52°
3
Hist. Avg.
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Jackson Park
Jackson Park's September 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 53° and 69°. The average high for September is 73° with an average low of 61°. 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.
