S
M
T
W
T
F
S
30
70°
65°
31
73°
66°
1
84°
70°
2
83°
69°
3
79°
68°
4
77°
64°
5
76°
59°
6
74°
57°
7
76°
53°
8
80°
56°
9
78°
66°
10
78°
62°
11
73°
54°
12
81°
55°
13
78°
61°
14
68°
52°
15
79°
52°
16
77°
66°
17
79°
65°
18
70°
51°
19
67°
55°
20
65°
52°
21
60°
48°
22
63°
48°
23
62°
52°
24
68°
54°
25
66°
53°
26
67°
52°
27
67°
53°
28
68°
54°
29
71°
55°
30
71°
55°
1
70°
48°
2
64°
53°
3
63°
52°
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 71°, with overnight lows between 48° and 55°. The average high for September is 66° 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.
