S
M
T
W
T
F
S
26
65°
45°
27
68°
46°
28
61°
43°
29
54°
43°
30
53°
37°
1
49°
31°
2
48°
34°
3
56°
45°
4
69°
51°
5
58°
39°
6
53°
38°
7
48°
33°
8
54°
41°
9
57°
40°
10
61°
43°
11
62°
44°
12
63°
43°
13
62°
42°
14
60°
47°
15
64°
44°
16
63°
41°
17
64°
50°
18
71°
52°
19
70°
52°
20
72°
53°
21
74°
54°
22
72°
54°
23
75°
49°
24
66°
45°
25
66°
49°
26
67°
54°
27
75°
55°
28
71°
54°
29
69°
50°
30
68°
49°
31
71°
47°
1
68°
50°
2
68°
53°
3
69°
48°
4
69°
47°
5
70°
48°
6
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grass Lake
Grass Lake's May 2026 forecast shows daily high temperatures ranging from 48° to 75°, with overnight lows between 31° and 55°. The average high for May is 65° with an average low of 46°. 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 Grass Lake. See also: June | July | August.
