S
M
T
W
T
F
S
26
68°
45°
27
70°
43°
28
72°
48°
29
68°
50°
30
68°
45°
1
77°
45°
2
81°
43°
3
77°
54°
4
68°
48°
5
63°
52°
6
64°
50°
7
59°
48°
8
68°
45°
9
73°
48°
10
73°
52°
11
61°
46°
12
54°
37°
13
59°
41°
14
55°
46°
15
54°
43°
16
59°
43°
17
66°
45°
18
63°
46°
19
66°
45°
20
66°
55°
21
75°
55°
22
81°
52°
23
84°
54°
24
86°
59°
25
86°
61°
26
88°
63°
27
90°
59°
28
85°
57°
29
89°
61°
30
92°
64°
31
81°
58°
1
79°
59°
2
78°
58°
3
77°
57°
4
76°
56°
5
79°
57°
6
81°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ulm
Ulm's May 2026 forecast shows daily high temperatures ranging from 76° to 92°, with overnight lows between 56° and 64°. The average high for May is 82° with an average low of 58°. 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.