S
M
T
W
T
F
S
26
65°
44°
27
61°
44°
28
53°
37°
29
55°
38°
30
52°
37°
1
53°
35°
2
67°
34°
3
71°
50°
4
62°
43°
5
51°
33°
6
48°
30°
7
61°
36°
8
73°
41°
9
61°
48°
10
61°
38°
11
72°
37°
12
72°
57°
13
73°
45°
14
80°
51°
15
91°
56°
16
82°
53°
17
79°
54°
18
66°
45°
19
54°
40°
20
62°
46°
21
71°
47°
22
70°
51°
23
73°
54°
24
78°
53°
25
72°
52°
26
80°
56°
27
79°
55°
28
79°
56°
29
75°
52°
30
76°
57°
31
79°
58°
1
80°
58°
2
72°
57°
3
72°
55°
4
74°
56°
5
79°
59°
6
76°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Crystal
Lake Crystal's May 2026 forecast shows daily high temperatures ranging from 54° to 82°, with overnight lows between 40° and 59°. The average high for May is 74° with an average low of 53°. 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 Crystal. See also: June | July | August.