S
M
T
W
T
F
S
26
55°
41°
27
64°
45°
28
64°
50°
29
52°
36°
30
50°
32°
1
45°
32°
2
57°
30°
3
66°
45°
4
79°
48°
5
57°
39°
6
54°
32°
7
55°
32°
8
66°
32°
9
68°
43°
10
61°
34°
11
52°
36°
12
73°
36°
13
61°
41°
14
66°
36°
15
77°
52°
16
84°
52°
17
67°
63°
18
78°
67°
19
74°
46°
20
58°
38°
21
58°
41°
22
64°
46°
23
68°
51°
24
73°
50°
25
70°
51°
26
73°
53°
27
74°
52°
28
73°
49°
29
72°
50°
30
75°
56°
31
76°
55°
1
74°
56°
2
76°
55°
3
68°
52°
4
68°
50°
5
71°
56°
6
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Delafield
Delafield's May 2026 forecast shows daily high temperatures ranging from 58° to 84°, with overnight lows between 38° and 67°. The average high for May is 71° with an average low of 52°. 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 Delafield. See also: June | July | August.