S
M
T
W
T
F
S
30
82°
63°
31
79°
66°
1
86°
69°
2
76°
69°
3
86°
69°
4
88°
63°
5
83°
59°
6
77°
62°
7
80°
60°
8
79°
58°
9
77°
61°
10
83°
61°
11
79°
60°
12
80°
60°
13
79°
58°
14
78°
59°
15
75°
58°
16
75°
61°
17
76°
55°
18
73°
52°
19
72°
52°
20
73°
55°
21
77°
59°
22
80°
60°
23
81°
60°
24
80°
58°
25
77°
55°
26
78°
56°
27
79°
57°
28
78°
57°
29
79°
55°
30
71°
51°
1
68°
50°
2
71°
53°
3
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Highland Park
Highland Park's September 2026 forecast shows daily high temperatures ranging from 68° to 88°, with overnight lows between 50° and 69°. The average high for September is 78° with an average low of 58°. 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 Highland Park. See also: October | November | December.
