S
M
T
W
T
F
S
26
39°
34°
27
46°
32°
28
50°
30°
29
50°
43°
30
61°
43°
1
61°
37°
2
50°
39°
3
48°
36°
4
46°
34°
5
41°
32°
6
46°
32°
7
48°
30°
8
63°
32°
9
59°
41°
10
52°
39°
11
50°
36°
12
59°
30°
13
63°
37°
14
57°
45°
15
61°
48°
16
57°
43°
17
61°
43°
18
68°
39°
19
72°
50°
20
70°
50°
21
68°
48°
22
61°
52°
23
66°
52°
24
55°
50°
25
54°
48°
26
52°
46°
27
48°
45°
28
52°
43°
29
61°
45°
30
57°
52°
31
72°
48°
1
68°
54°
2
72°
54°
3
75°
61°
4
72°
63°
5
72°
55°
6
61°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Trondheim
Trondheim's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Trondheim. See also: June | July | August.