S
M
T
W
T
F
S
30
75°
68°
31
84°
71°
1
94°
74°
2
98°
71°
3
84°
68°
4
78°
68°
5
80°
63°
6
78°
60°
7
78°
59°
8
82°
61°
9
77°
70°
10
82°
61°
11
76°
58°
12
82°
63°
13
80°
59°
14
69°
52°
15
78°
63°
16
73°
64°
17
70°
62°
18
73°
56°
19
65°
58°
20
64°
58°
21
64°
48°
22
64°
53°
23
66°
52°
24
67°
45°
25
68°
50°
26
72°
53°
27
70°
53°
28
71°
55°
29
70°
56°
30
69°
54°
1
68°
53°
2
71°
49°
3
64°
56°
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 64° to 72°, with overnight lows between 45° and 56°. The average high for September is 68° with an average low of 52°. 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.
