S
M
T
W
T
F
S
26
63°
48°
27
64°
46°
28
63°
40°
29
59°
41°
30
57°
38°
1
62°
40°
2
61°
41°
3
63°
42°
4
67°
43°
5
60°
43°
6
61°
40°
7
66°
46°
8
63°
49°
9
69°
49°
10
71°
48°
11
71°
51°
12
72°
51°
13
73°
47°
14
64°
44°
15
65°
47°
16
70°
52°
17
75°
54°
18
76°
47°
19
66°
43°
20
64°
43°
21
66°
50°
22
69°
53°
23
72°
54°
24
77°
56°
25
78°
54°
26
74°
49°
27
67°
50°
28
68°
52°
29
69°
55°
30
71°
54°
31
73°
52°
1
73°
48°
2
72°
51°
3
77°
49°
4
75°
51°
5
78°
50°
6
74°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glendale Heights
Glendale Heights's May 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 38° and 56°. The average high for May is 69° with an average low of 48°. 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 Glendale Heights. See also: June | July | August.
