S
M
T
W
T
F
S
26
64°
37°
27
66°
39°
28
66°
41°
29
64°
45°
30
59°
37°
1
70°
34°
2
75°
39°
3
75°
46°
4
70°
48°
5
63°
46°
6
N/A
7
61°
39°
8
69°
44°
9
73°
47°
10
72°
51°
11
67°
44°
12
56°
39°
13
59°
40°
14
58°
42°
15
59°
43°
16
62°
45°
17
62°
45°
18
64°
46°
19
64°
46°
20
62°
46°
21
66°
49°
22
69°
49°
23
62°
47°
24
63°
51°
25
70°
53°
26
71°
54°
27
71°
55°
28
70°
55°
29
70°
54°
30
69°
55°
31
72°
56°
1
72°
56°
2
73°
55°
3
72°
56°
4
73°
57°
5
73°
57°
6
72°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Ulm
Ulm's May 2026 forecast shows daily high temperatures ranging from 56° to 73°, with overnight lows between 39° and 57°. The average high for May is 67° with an average low of 49°. 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 Ulm. See also: June | July | August.