S
M
T
W
T
F
S
26
63°
46°
27
78°
61°
28
73°
52°
29
59°
42°
30
57°
39°
1
55°
34°
2
52°
37°
3
61°
45°
4
70°
49°
5
69°
47°
6
64°
45°
7
61°
45°
8
60°
47°
9
62°
46°
10
64°
47°
11
66°
46°
12
73°
51°
13
71°
44°
14
64°
44°
15
64°
43°
16
65°
44°
17
66°
44°
18
70°
54°
19
76°
54°
20
75°
48°
21
68°
50°
22
70°
47°
23
72°
49°
24
77°
58°
25
78°
56°
26
74°
52°
27
70°
50°
28
74°
51°
29
78°
56°
30
79°
58°
31
80°
59°
1
81°
60°
2
81°
61°
3
82°
61°
4
82°
59°
5
79°
56°
6
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in De Graff
De Graff's May 2026 forecast shows daily high temperatures ranging from 52° to 82°, with overnight lows between 34° and 61°. The average high for May is 70° with an average low of 50°. 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 De Graff. See also: June | July | August.