S
M
T
W
T
F
S
26
63°
38°
27
67°
37°
28
64°
57°
29
62°
44°
30
54°
39°
1
51°
40°
2
48°
31°
3
64°
26°
4
76°
45°
5
75°
50°
6
55°
43°
7
56°
33°
8
66°
36°
9
71°
40°
10
69°
35°
11
59°
31°
12
60°
29°
13
59°
45°
14
66°
43°
15
71°
35°
16
81°
48°
17
86°
55°
18
87°
58°
19
87°
54°
20
63°
39°
21
63°
44°
22
63°
54°
23
66°
53°
24
68°
52°
25
72°
56°
26
76°
55°
27
73°
54°
28
77°
54°
29
74°
56°
30
77°
58°
31
77°
56°
1
72°
51°
2
76°
56°
3
72°
54°
4
68°
54°
5
69°
53°
6
73°
57°
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 63° to 87°, with overnight lows between 39° and 58°. The average high for May is 72° 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 South Lyon. See also: June | July | August.
