S
M
T
W
T
F
S
30
65°
49°
31
68°
45°
1
77°
54°
2
74°
51°
3
65°
50°
4
57°
38°
5
66°
40°
6
71°
44°
7
74°
51°
8
73°
52°
9
67°
49°
10
65°
42°
11
63°
44°
12
61°
40°
13
59°
38°
14
62°
41°
15
67°
47°
16
66°
47°
17
58°
46°
18
60°
45°
19
61°
45°
20
62°
44°
21
57°
43°
22
57°
40°
23
58°
41°
24
53°
40°
25
58°
43°
26
63°
44°
27
60°
43°
28
61°
44°
29
58°
43°
30
61°
42°
1
61°
42°
2
62°
41°
3
62°
41°
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 53° to 77°, with overnight lows between 38° and 54°. The average high for September is 63° with an average low of 44°. 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.
