S
M
T
W
T
F
S
26
55°
39°
27
68°
43°
28
64°
50°
29
54°
35°
30
49°
31°
1
46°
29°
2
52°
27°
3
68°
47°
4
77°
50°
5
56°
42°
6
51°
41°
7
53°
41°
8
58°
41°
9
59°
44°
10
58°
44°
11
59°
45°
12
63°
47°
13
65°
48°
14
64°
49°
15
65°
50°
16
69°
48°
17
71°
51°
18
64°
50°
19
69°
54°
20
68°
54°
21
66°
44°
22
62°
44°
23
62°
46°
24
64°
45°
25
64°
46°
26
65°
47°
27
64°
47°
28
65°
48°
29
65°
52°
30
67°
57°
31
73°
52°
1
67°
53°
2
71°
57°
3
73°
58°
4
75°
58°
5
76°
59°
6
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Bluff
Lake Bluff's May 2026 forecast shows daily high temperatures ranging from 51° to 77°, with overnight lows between 41° and 60°. The average high for May is 66° 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 Lake Bluff. See also: June | July | August.
