S
M
T
W
T
F
S
26
65°
52°
27
67°
47°
28
73°
39°
29
74°
51°
30
68°
53°
1
64°
52°
2
58°
51°
3
66°
46°
4
76°
43°
5
78°
56°
6
83°
55°
7
74°
53°
8
71°
52°
9
76°
55°
10
83°
62°
11
81°
54°
12
70°
49°
13
77°
48°
14
78°
57°
15
75°
48°
16
81°
53°
17
89°
59°
18
89°
68°
19
88°
63°
20
88°
64°
21
87°
65°
22
75°
67°
23
83°
69°
24
78°
70°
25
80°
71°
26
84°
70°
27
85°
68°
28
83°
65°
29
79°
62°
30
72°
58°
31
73°
61°
1
76°
59°
2
81°
63°
3
82°
64°
4
81°
63°
5
82°
64°
6
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grantsboro
Grantsboro's May 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 58° and 71°. The average high for May is 80° with an average low of 64°. 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 Grantsboro. See also: June | July | August.