S
M
T
W
T
F
S
26
59°
42°
27
69°
51°
28
67°
51°
29
56°
42°
30
56°
41°
1
50°
35°
2
57°
39°
3
65°
45°
4
64°
47°
5
61°
44°
6
59°
42°
7
59°
42°
8
60°
43°
9
61°
45°
10
68°
44°
11
62°
47°
12
63°
44°
13
62°
41°
14
61°
41°
15
62°
42°
16
64°
46°
17
66°
49°
18
73°
53°
19
73°
48°
20
69°
47°
21
65°
47°
22
66°
46°
23
72°
54°
24
75°
55°
25
76°
54°
26
71°
49°
27
68°
49°
28
71°
55°
29
77°
56°
30
78°
57°
31
78°
57°
1
79°
58°
2
80°
59°
3
81°
58°
4
79°
54°
5
70°
53°
6
74°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lombard
Lombard's May 2026 forecast shows daily high temperatures ranging from 50° to 81°, with overnight lows between 35° and 59°. The average high for May is 67° 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 Lombard. See also: June | July | August.