S
M
T
W
T
F
S
26
86°
62°
27
91°
64°
28
90°
65°
29
90°
61°
30
87°
67°
1
90°
68°
2
87°
65°
3
81°
63°
4
86°
60°
5
88°
60°
6
94°
67°
7
91°
72°
8
92°
71°
9
92°
70°
10
92°
73°
11
86°
66°
12
88°
66°
13
90°
68°
14
92°
70°
15
92°
71°
16
91°
70°
17
92°
71°
18
89°
69°
19
88°
67°
20
87°
70°
21
89°
69°
22
89°
71°
23
88°
71°
24
87°
70°
25
85°
71°
26
85°
71°
27
86°
70°
28
85°
71°
29
85°
72°
30
86°
72°
31
83°
71°
1
85°
72°
2
85°
73°
3
87°
72°
4
86°
73°
5
86°
73°
6
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Crystal Lakes
Crystal Lakes's May 2026 forecast shows daily high temperatures ranging from 83° to 94°, with overnight lows between 66° and 73°. The average high for May is 88° with an average low of 70°. 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 Crystal Lakes. See also: June | July | August.