S
M
T
W
T
F
S
26
60°
36°
27
65°
30°
28
59°
32°
29
56°
45°
30
55°
46°
1
65°
40°
2
59°
41°
3
56°
31°
4
72°
42°
5
79°
48°
6
71°
57°
7
66°
48°
8
63°
34°
9
60°
32°
10
74°
51°
11
63°
36°
12
65°
35°
13
67°
40°
14
63°
45°
15
58°
43°
16
76°
58°
17
84°
51°
18
80°
59°
19
90°
68°
20
85°
54°
21
68°
45°
22
69°
48°
23
70°
49°
24
67°
47°
25
68°
53°
26
75°
52°
27
76°
53°
28
72°
48°
29
67°
48°
30
68°
54°
31
70°
54°
1
70°
52°
2
71°
52°
3
70°
50°
4
69°
48°
5
70°
54°
6
71°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Millis
Millis's May 2026 forecast shows daily high temperatures ranging from 58° to 90°, with overnight lows between 43° and 68°. The average high for May is 72° 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 Millis. See also: June | July | August.