S
M
T
W
T
F
S
26
63°
38°
27
67°
37°
28
64°
57°
29
62°
44°
30
54°
39°
1
49°
32°
2
50°
33°
3
60°
45°
4
68°
51°
5
57°
42°
6
52°
38°
7
49°
32°
8
52°
40°
9
56°
41°
10
59°
43°
11
60°
43°
12
60°
45°
13
61°
42°
14
58°
46°
15
63°
44°
16
62°
41°
17
63°
50°
18
70°
52°
19
69°
52°
20
71°
53°
21
73°
53°
22
71°
54°
23
74°
49°
24
65°
45°
25
65°
48°
26
66°
54°
27
74°
54°
28
69°
53°
29
67°
50°
30
68°
49°
31
70°
46°
1
67°
50°
2
67°
53°
3
68°
47°
4
68°
47°
5
67°
48°
6
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Lyon
South Lyon's May 2026 forecast shows daily high temperatures ranging from 49° to 74°, with overnight lows between 32° and 54°. The average high for May is 64° 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 South Lyon. See also: June | July | August.
