S
M
T
W
T
F
S
30
91°
72°
31
94°
73°
1
94°
73°
2
93°
72°
3
93°
73°
4
92°
74°
5
92°
73°
6
91°
73°
7
91°
72°
8
92°
72°
9
93°
73°
10
93°
72°
11
90°
71°
12
91°
72°
13
93°
73°
14
93°
73°
15
92°
71°
16
89°
70°
17
90°
72°
18
92°
71°
19
91°
71°
20
90°
72°
21
91°
72°
22
91°
73°
23
89°
72°
24
89°
71°
25
88°
69°
26
88°
70°
27
89°
71°
28
88°
71°
29
89°
70°
30
88°
71°
1
88°
69°
2
89°
68°
3
89°
71°
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 88° to 94°, with overnight lows between 68° and 74°. The average high for September is 91° with an average low of 72°. 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.
