S
M
T
W
T
F
S
26
57°
39°
27
72°
36°
28
58°
50°
29
56°
50°
30
58°
40°
1
62°
32°
2
53°
36°
3
62°
38°
4
77°
33°
5
82°
50°
6
64°
54°
7
65°
46°
8
65°
36°
9
64°
46°
10
64°
46°
11
64°
41°
12
71°
33°
13
69°
47°
14
53°
45°
15
72°
49°
16
82°
40°
17
88°
56°
18
94°
55°
19
89°
61°
20
85°
61°
21
62°
52°
22
N/A
23
48°
44°
24
59°
55°
25
74°
60°
26
78°
59°
27
80°
60°
28
76°
47°
29
74°
44°
30
70°
49°
31
74°
50°
1
74°
51°
2
75°
53°
3
77°
50°
4
76°
51°
5
75°
52°
6
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Millheim
Millheim's May 2026 forecast shows daily high temperatures ranging from 48° to 80°, with overnight lows between 44° and 60°. 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 Millheim. See also: June | July | August.