S
M
T
W
T
F
S
26
69°
48°
27
80°
44°
28
77°
53°
29
67°
49°
30
56°
39°
1
59°
34°
2
54°
33°
3
61°
30°
4
72°
47°
5
76°
59°
6
62°
48°
7
63°
38°
8
69°
50°
9
72°
51°
10
76°
50°
11
62°
37°
12
61°
46°
13
71°
53°
14
73°
52°
15
76°
51°
16
72°
53°
17
73°
51°
18
73°
51°
19
76°
50°
20
70°
48°
21
69°
47°
22
70°
51°
23
71°
52°
24
71°
49°
25
72°
49°
26
72°
50°
27
73°
48°
28
73°
49°
29
77°
52°
30
79°
57°
31
80°
58°
1
75°
58°
2
79°
56°
3
81°
59°
4
82°
60°
5
82°
60°
6
81°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Millstone
Millstone's May 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 37° and 60°. The average high for May is 73° with an average low of 51°. 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 Millstone. See also: June | July | August.