S
M
T
W
T
F
S
26
61°
40°
27
74°
41°
28
64°
53°
29
53°
43°
30
49°
38°
1
46°
35°
2
45°
32°
3
53°
32°
4
70°
45°
5
66°
48°
6
51°
40°
7
52°
38°
8
55°
43°
9
60°
48°
10
58°
41°
11
52°
40°
12
53°
44°
13
57°
47°
14
60°
48°
15
65°
48°
16
63°
49°
17
63°
47°
18
62°
48°
19
65°
49°
20
63°
45°
21
64°
44°
22
64°
45°
23
65°
48°
24
66°
48°
25
69°
52°
26
70°
51°
27
67°
49°
28
71°
53°
29
68°
53°
30
74°
56°
31
77°
57°
1
76°
57°
2
71°
55°
3
74°
57°
4
78°
59°
5
78°
60°
6
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Highland Park
Highland Park's May 2026 forecast shows daily high temperatures ranging from 51° to 78°, with overnight lows between 38° and 60°. The average high for May is 65° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Highland Park. See also: June | July | August.