S
M
T
W
T
F
S
26
69°
45°
27
67°
49°
28
62°
50°
29
53°
41°
30
50°
39°
1
47°
39°
2
50°
33°
3
60°
43°
4
77°
51°
5
56°
45°
6
56°
35°
7
57°
41°
8
65°
46°
9
67°
39°
10
61°
33°
11
59°
29°
12
55°
44°
13
55°
39°
14
63°
43°
15
67°
48°
16
70°
47°
17
73°
50°
18
76°
54°
19
74°
52°
20
74°
55°
21
80°
47°
22
62°
42°
23
64°
45°
24
65°
46°
25
65°
46°
26
66°
47°
27
68°
46°
28
68°
48°
29
72°
52°
30
74°
53°
31
76°
55°
1
74°
52°
2
70°
51°
3
76°
56°
4
78°
58°
5
78°
58°
6
75°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in McDonald
McDonald's May 2026 forecast shows daily high temperatures ranging from 55° to 80°, with overnight lows between 29° and 58°. The average high for May is 69° with an average low of 48°. 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 McDonald. See also: June | July | August.