S
M
T
W
T
F
S
26
55°
40°
27
60°
42°
28
62°
45°
29
65°
48°
30
62°
49°
1
66°
49°
2
66°
48°
3
61°
42°
4
60°
44°
5
62°
44°
6
64°
43°
7
63°
43°
8
63°
44°
9
67°
48°
10
67°
45°
11
64°
44°
12
64°
46°
13
61°
45°
14
65°
46°
15
70°
53°
16
69°
52°
17
71°
54°
18
70°
53°
19
70°
53°
20
69°
54°
21
66°
54°
22
67°
53°
23
68°
54°
24
67°
54°
25
64°
53°
26
64°
48°
27
67°
50°
28
71°
54°
29
67°
45°
30
66°
47°
31
67°
49°
1
67°
51°
2
68°
49°
3
67°
48°
4
68°
54°
5
71°
53°
6
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Troisdorf
Troisdorf's May 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 40° and 55°. The average high for May is 66° 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 Troisdorf. See also: June | July | August.
