S
M
T
W
T
F
S
26
63°
40°
27
64°
37°
28
68°
41°
29
66°
45°
30
66°
45°
1
75°
46°
2
75°
46°
3
66°
54°
4
64°
50°
5
57°
50°
6
50°
46°
7
59°
46°
8
64°
46°
9
69°
48°
10
67°
43°
11
56°
38°
12
58°
47°
13
59°
45°
14
57°
42°
15
61°
45°
16
58°
45°
17
60°
47°
18
63°
49°
19
64°
48°
20
65°
52°
21
64°
51°
22
69°
47°
23
70°
53°
24
64°
52°
25
64°
52°
26
63°
51°
27
63°
48°
28
62°
47°
29
63°
47°
30
64°
52°
31
64°
52°
1
66°
50°
2
64°
50°
3
64°
48°
4
65°
51°
5
64°
48°
6
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Heinsberg
Heinsberg's May 2026 forecast shows daily high temperatures ranging from 56° to 70°, with overnight lows between 38° and 53°. The average high for May is 63° with an average low of 48°. 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 Heinsberg. See also: June | July | August.