S
M
T
W
T
F
S
30
81°
61°
31
80°
60°
1
79°
56°
2
78°
54°
3
79°
53°
4
79°
52°
5
77°
51°
6
68°
50°
7
67°
53°
8
67°
58°
9
68°
57°
10
67°
54°
11
67°
48°
12
66°
53°
13
66°
57°
14
67°
53°
15
65°
50°
16
64°
49°
17
66°
51°
18
70°
54°
19
74°
51°
20
73°
51°
21
70°
47°
22
63°
46°
23
63°
49°
24
64°
48°
25
62°
46°
26
62°
47°
27
63°
50°
28
63°
49°
29
61°
49°
30
60°
47°
1
62°
50°
2
65°
54°
3
69°
50°
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 60° to 81°, with overnight lows between 46° and 61°. 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.
