S
M
T
W
T
F
S
26
66°
34°
27
68°
32°
28
71°
35°
29
71°
28°
30
69°
44°
1
64°
43°
2
63°
39°
3
73°
30°
4
71°
47°
5
58°
36°
6
65°
32°
7
73°
23°
8
81°
30°
9
81°
46°
10
82°
45°
11
86°
41°
12
87°
48°
13
83°
48°
14
82°
42°
15
84°
41°
16
86°
40°
17
80°
41°
18
82°
44°
19
80°
42°
20
83°
44°
21
82°
42°
22
76°
43°
23
80°
44°
24
81°
45°
25
80°
44°
26
79°
44°
27
77°
43°
28
77°
45°
29
76°
45°
30
80°
44°
31
78°
43°
1
76°
46°
2
78°
46°
3
82°
47°
4
85°
48°
5
84°
47°
6
85°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grants
Grants's May 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 40° and 48°. The average high for May is 81° with an average low of 44°. 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 Grants. See also: June | July | August.