S
M
T
W
T
F
S
30
96°
63°
31
96°
62°
1
95°
63°
2
95°
64°
3
94°
63°
4
95°
62°
5
93°
58°
6
91°
55°
7
86°
60°
8
87°
60°
9
91°
62°
10
93°
62°
11
93°
61°
12
91°
61°
13
92°
60°
14
92°
58°
15
88°
56°
16
85°
58°
17
90°
60°
18
92°
61°
19
92°
62°
20
91°
61°
21
91°
61°
22
84°
58°
23
82°
55°
24
86°
54°
25
84°
53°
26
83°
54°
27
82°
53°
28
80°
53°
29
81°
51°
30
80°
53°
1
80°
60°
2
83°
59°
3
87°
58°
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 80° to 96°, with overnight lows between 51° and 64°. The average high for September is 89° with an average low of 59°. 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.
